
I think Yuuya is just being jealous of Naoya and he just want to be in a spotlight that's why he act this way. I guess in the end, Yuuya may disappear (integrate with Naoya)

More than being jealous I think that he hate Naoya.
They are two people sharing the same body, but Naoya decided to stop replying on Yuuya even if this means that he will get hurt, and he also decided to not switch with Yuuya anymore. For Yuuya, Naoya tried to get rid of him, so he is trying to do the same. Moreover, when Naoya got rejected, he tried to kill himself which would have result in Yuuya death, but Yuuya want ed to live....
It is so damn psychological

Oh wow. Three stories with completely different vibes.
The first one I thought Shiro is the seme (but I hope he's the uke) and turned out he's an uke for Shohei! I'm so happy.
The second one is incomplete though. Sensei hasn't confessed yet and they haven't had sex yet! Arghhhh
The third one, poor uke I think he loves the seme and wants to go steady but the seme only plays with him. Wish this is a longer story with a happy ending
I hope Seungho see them. I hope Nakyum is just drunk and hallucinated. I hope Nakyum isn't kidnapped again this time plssss