Niichan Chapter 5 Discussion

I would like to share my thoughts about the lastest chapter, the extra one. At the end I think that Yui can not get rid of his parents and feels guilty about the relationship he's hiding from them, (not only for them but Kei's feelings who made things "clear" with his own parents) so that's the reason why he must to take pills and also smoke after see his parents (the same as Kei after having sex because of the blaming feelings he developed to himself and his own existence) even when he's strong to the rest of the world it's different when it comes to his own parents (then lying in front of Niichan but also to himself in some point) This is my half convinced statement but could it be otherwise that Yui is maybe simply trying obsessively to appropriate the same habits of Kei as smoking and taking pills to calm down? That's my biggest doubt about it.
Talking about the plot of the manga I do appreciate that Harada sensei worked in this matter of pedophilia and clearly showed an avoided or hidden topic as how old traumatic experiences make this situations replicate many other times in real life involving other innocent victims and doing eternal the vicious circle. After all I also do agree with the idea that almost all of the perverts kinks and other paraphilias come from it.

@Ant161718 estaba por matarme escribiendo en ingles pero de pedo entre a chusmear tu perfil y vi que eras tucumana jaja, que queres decir con "After all I also do agree with the idea that almost all of the perverts kinks and other paraphilias come from it." No me quedo claro.
Hay muchas interpretaciones de porque se empieza a empastillar pero la mia es que empieza a sentir culpa y depresion por estar en el closet y simular otra cosa que no es,que a su vez tematicamente es algo muy japones esto de las dos caras. Aparte de que el ciclo se repite pero de distinta forma. el tiempo es un circulo plano y el queda en la misma situacion que kei al comienzo del manga