I didn't really read all of your comment (sorry) I just saw the part about the first time encountering DID in yaoi. I do know a bit about DID (psychology major in uni) and I don't really think that's DID portrayed in the manga, and if it is then I'm sorry to say that the author doesn't know much about DID. It is a disorder that occurs due to repeated trauma during childhood (it could be possible that the alter was created during his childhood but no info about that was given). And in thus case if it was in fact a child alter then that is in fact a child and performing any sexual act on it us considered pedophilic even if the body belongs to an adult (also the seme says multiple times that the uke is basically a child but has sex with him anyways so yea just a clarification). Hope that quenched your curiosity.
Thank you so much! Your answer really helped me. So DID is only triggered from childhood trauma and can't be from traumas that happen later on in life? I'm just assuming here but Yuuki already probably experienced a lot of trauma from his dad since he was a child and maybe just got a "final" blow when the incident happened... Is that possible that way?
And yeah I had a gut feeling it's pedophilic... But at the same time I don't think Tomo's at fault nor he's considered a pedophile because he didn't even know it was really a child in the first place.
Oh sorry I read your reply again and you did mention about my new question
"it could be possible that the alter was created during his childhood but no info about that was given"
I think he did experience a lot of trauma (especially extreme pressure) from his dad since he grew up that way and he was kinda hinting that it's suffocating to be in their house? I'll just assume it's like that cause that's how I understood it hahaha
Well I'm not denying the hardships he has gone through, but when I say trauma I mean like seriously damaging (and repetitive) trauma like physical/sexual abuse, witnessing murder etc. What happens is that the mind creates this amnesia wall in order to cope with the trauma (because the mind of a child cannot survive with all that pressure). It is essentially a coping mechanism, and this wall of amnesia causes the mind (I guess) to split creating these alters (which develop into their own conscience and become actual people with names and ages of all kinds). That's why its near impossible for an adult to develop this mental disorder, because their minds are developed enough to cope with the trauma without splitting, while in the case of a child their personality isn't fully integrated. So yes he may have that alter from his childhood and it was triggered to come out after he essentially killed his dad but we will never know for sure. (sorry I'm very passionate about this I did a lot of research about it for a presentation I had first year, if you wanna know more feel free to inbox me).
Actually its the same person but just split personalities due to the tragic misfortune that happened to him.... Soo its technically not pedophilic since its the same person but just with a different mindset... Btw this is coming from what i know i dont know if its 100% accurate its just my perspective of how i see it ٩(๑❛ᴗ❛๑)۶
No, it's fine, don't say sorry. I'm very happy you took time to explain it to me! In fact I should be the one sorry for not really exploring this more. Thank you so much for sharing this knowledge, I've learned a lot.
Also, are you still in uni now? You're doing great! It's really good to be passionate of the field you're taking, I'm slightly envious hahaha more power to you (๑•ㅂ•)و✧

First time encountering DID in BL! I don't know too much about DID so I'm really curious about Yuuta and Tomohisa's situation... It's basically Tomohisa having sex with a "little" and someone he and Yuuki consider to be their child to boot. Wanna ask anyone who's well-versed about DID, does this happen sometimes? Is it normal or is it weird? In the end though I guess it really depends on the parties involved whether they consent to it or not but still I'm curious and also whether if it's considered incest or not... Hm but now I think of it, Tomohisa and Yuuta really isn't blood-related but more like father-son in "bond" so it isn't incest scientifically/biologically? Really wondering if Yuuta sees Tomo romantically or not cause that would change things.