How yaois works : Seme likes uke = lets chase after him even if it takes a lifetime Uke l...

guess you were too busy looking for stereotypes to actually read the story

Lol a backstory doesn’t justify the uke’s action. All uke acts like that and they have a backstory to make an excuse to justify their actions but it’s just not a good excuse.

Please explain yourself because I can’t see how i’m wrong if you don’t.

He doesn't just have a backstory, he has thoughts and feelings, and the place sex has in his life is unhealthy. I'm sorry, but no matter what you just don't understand the uke, who is more complex than all those other ukes you are talking about

Oops, didn't see the part you're asking me to explain... Actually it's quite hard to put words on my thoughts (especially in english).
To me the key to understand everything is his relationship with the seme, 'cauze the author did a fine job with the atmosphere between those two, a lot is unsaid, you just understand their feelings by watching and trying to read the story with their point of view, you try to think like them and you see... They are not a couple (not yet at least). They're just two guys, with broken hearts (in the way that... they never had role models that were in love, "love" for them in nearly non existent, just a far away idea that doesn't concern them). The only thing that matter for them is sex. -the backstories only confirm that

For the seme, sex binds him to the other person (and he likes to "have" someone by his side) but to the uke it's the contrary, sex makes him forget "everything", like.... He needs an escape, away for life. In the flashbacks he's what, in middleschool ? just imagine that you're in university and since middle school the only thing you got to make feel better is sex. But that actually, it doesn't make feel better it just makes you forget who you are. And that you have an habit of picking strangers on the street whenever you feel like it.
Now imagine the way you have sex changes significally and that you find yourself in need of someone else all of sudden and that person says he's gonna leave your side. I don't see what would restrain the uke from having sex at that moment. It's just... the same thing he's been doing his whole life. He's reassuring himself, "I can still do it, it still works"

I don’t feel like uke has been using sex all his life to forget things. So far uke has been having sex for his lust.

Also Uke didnt even realise he was in love (thats super cliche) and when he realise it, it’s like he can’t live without that person (quite cliche) and when he lost hope, he ran away to get fucked (cliche again).

But maybe i am wrong and Uke uses sex as a mean to forget his troubles, so that means everytime he will have a fight with his lover, he will bang a stranger to *forget everything*, or whenever his lover ain’t there and uke is in trouble, he will go get sex from someone else. If thats what he is being doing all his life, he won’t be able to change it, even if he is in a relationship

Yeah maybe for his lust but not just that... at least his first time seals the deal making him thing that's its pretty easy and comfortable.
He denies his feelings because of his past too (okay a little cliche).. and yeah well he's broken hearted... feeling like you're gonna die the moment you get heart broken ain't really a cliche... cauze actually does hurt quite a bit.
And I don't think that has anything to do with being unfaithful. Like I said, they aren't a couple atm so he ain't a cheater

Heartbreak is hurtful but i think it is cliche to make is that much of a big deal.

If he had been in a relationship for over a year, that much of a reaction i would not say cliche. But he never dated the seme and now that he learns seme got a girlfriend, he was sad to the point i call it cliche.
I just think that uke that gets comfort through sex is an annoying cliche. This time at least it wasn’t a misunderstand, the seme purposely lied, but the response was just too much.

No it wasnt. He wanted to forget. He wanted to prove a point to himself. I think the reaction was realistic. How many people get heartbroken and that or the next night find themselves having sex with someone? They do it because:
1. They don't want to feel lonely.
2. They want to forget the pain they're in.

I would agree with you if you meant an heartbreak from a break up. This is an heartbreak from a one-sided crush(he thought it was)

It's more than a crush. Blondie was his fuck buddy, and they lived together. No matter how many women they shared the uke knew they'll be there for each other in the end. Then blondie said he had a girlfriend, and crushed everything. In that moment, the uke felt empty and alone. That's why he said make a mess of me.

Heartache and pain happen with one-sided crushes too.

I still think the reaction was too much (not that it’s impossible in real life, but i think not much people would react like that) and it’s overused in yaoi aka cliche.