
Yes, the age of consent is 13, but the law forbids sexual acts with people under 18! Also, most prefectures have their own extra rules about sex between unmarried people! XD
The age you can legally buy alcohol and smoke in Japan is 20.
Manga make it seem like it's okay to mess with High schoolers but... Do that in Japan and get ready to face charges!
The schools even monitor their students after school hours! If a teacher sees you in town later at night/evening they will stop you and call your parents.. Especially the strict private schools.

Okay age of consent is 13. So is it morally okay? Rapist are legally allowed rights over their victim’s body. Does that make it okay? An extreme example, but I’m just trying to make a point. I really hope you guys aren’t out hear thinking just because it’s legal Japanese 13 year old are consenting adults because that’s more problematic than this manga.

Well, to judge whether or not it is morally okay depends on your education and your society’s general conventions.
For exemple, it does not shock me as my country fixed age of consent at 15.
But I have to say that I am appalled by your extreme exemple as you would mix rape with consented sexual relationships, albeit underaged for you, without knowing the legal provisions relating to it. Sorry, that’s the lawyer in me speaking.
Finally, just to chill out a bit, it was not explicit that they had sex together.

I usually don't engage with comments on this site but ignorance like this can be harmful to other people. First of all, Age of Consent does not mean you can fuck a child if they are above the age of consent. It means kids from that age can manifest consent when having sex WITH KIDS AROUND THE SAME AGE.
Like, for example, if the age of consent is 13, it means kids who are 13, 14, 15 can have sex without it being considered a crime; but kids 12 and under CANNOT manifest that consent and this another (older or younger) kid making sexual advances on them would be considered COCSA.
Adults can only legally have sex with kids if, for example, the adult is still a teen, aka if the adult just turned 18 and they’re having sex with a 17-year-old. That’s widely considered admissible and it’s an exception to the rule.
In this case, a relationship involving sex between a 26-year-old and a high schooler would be considered a FELONY in Japan, punishable by up to 20 years of forced labor. Why? Because even if they gave consent it is still considered STATUTORY RAPE (ever heard of that?) and is illegal.
Not only is it morally wrong but also legally wrong. So, no, you 20-something and older creeps fetishizing girls (real or fictional) are still pedophiles, and you’re trying to use a legal argument that you:
1. do not know about because you just read a fucking wikipedia article and did not take years of classes about criminal law
2. twist for it to fit and excuse your awful behavior and sick fantasies
TL;DR: rape = consented sexual relationship between an adult and a minor, you dumbfuck

Firstly, I stated in my previous comment that the comparison was extreme. In hindsight after you put it in perspective I realized...it’s not. The law is flawed. The justice system has failed to protect citizens and people. I will not you educate on the inadequacies within the law system because considering you implied you had already existing knowledge on the subject, you would already know.
You claimed that there’s a cultural and education indescrepency between cultures when on the topic of morality. To a degree you are right. However, you cannot excuse the abuse(emotional or physical) of a young person with culture. I’m not saying that this is the case in this instance, but generally your entire perspective is appalling.
You must never have spoken to a young person about their sexual abuse. You must have never spoken to young girls about the pressure to have sex. The belief that they cannot say no. You never spoken to a child and heard them defend their abusers because they must have done something wrong. And yes this is a cultural aspect. Something that is rampant in my country, my neighborhood. AND THAT DOESN'T MEAN IT IS OKAY. This isn’t me communicating as someone in the Psychology field, this is me as human being saying and you can quote me “IT IS NOT OKAY TO HAVE SEX WITH AN UNDERAGE CHILD!”

Take it easy friend, saying ignorance to someone else would lead you to nothing but your own spit. I am just saying that your definition of child is not the same depending on countries. It might be considered sad for some people around the globe that consider that sexual intercourses under 18 is wrong but that is the truth.
Plus, your answer is just dumb. No, age of consent does not mean that kids above legal age can also have kids with other kids around the same age. No, underaged kids who have intercourse with other underaged kids are still committing a crime if the existing law provides punishment for underaged sexual intercourses. My first criminal case when I was a law student involved minors having sex.
Again, I stated also that in the case of our MC and his ex, although creepy, their relationship was not explicitely sexual. In Asia, it is common to have relationships without sex in high school because well, asian society is still quite prude.
And to answer your stupid, agresive points :
1. I am a full grown up, 36 years old lawyer so yeah wikipedia does nothing for me.
2. I don’t have any fantasies about kids, as I did major works trying to sue criminals against various sick crimes against kids. However, I would suggest you would take some courses against your anger as you cannot discuss without spitting and throwing tantrum. Kid, nothing good in life is awaiting you with that attitude.
And finally, that is not the definition of rape. Sexual relationship between adult and minor is qualified rape by extension when unlawful. Don’t mix definition and consequence.

Wrong, I did work with children who were victims from abuse hence my peculiar care with words when people shout rape.
I am far from saying that it is okay to have sex with underaged kids. But I am always peeved when people put morals as extra layers above the law. You’re saying that the law is flawed and I have to agree to some extent as I myself was facing lots and lots of difficulties with the failures in the system. But to me, it's just you putting your judgement on someone else’s society values because it does not meet your standards while you fail to prove that it is unlawful.

Your argument is running in circles and you’re repeating yourself without introducing any actual relevant rebuttals. Honestly, I mourn any interaction you’ve ever had with a child. You’re trying to defend your point and come across as fair, but you just present yourself as even more inhumane. You’ve implied my views to be judgemental and while no human can be without bias I think I’ve been considerably impartial and civil while communicating with you. However, if you want me to give my complete thoughts, I will. Understand what I think of you is less than what I’ve conveyed. Your prespective is detestable and I’m honestly disgusted. The only thing deeper than your immorality is your lack of ability to perceive the rampant corruption that lies within you. And this...this is me being judgemental. If you’re upset or want to throw a tantrum to reply, go ahead. I won’t reply though, and I won’t read it. I do not want to endure anymore exposure to an entity as toxic as you.
I usually don’t mind, but since he’s an ex, Kou must have been younger so probably 15. Hide seems cool, but that’s a crime. If Kou was in college at least I’d feel better. Even in Sayonara Alpha where it was an omegaverse they waited. I’m gonna need more info about this “relationship”. I know I’m snatching Hide’s wig and beard but 26 isn’t old. Like to date a 15 year old...? Yeah, but as far as life knowledge most are still a mess. You know what, I’m lying. It depends because some are married with kids. Are they mature tho? They’re okay, I guess. Most of them I know are good parents definitely. I’ve reared off track. My whole point was that Hide’s character could be problematic.