Sagawa is such a fucking asshole. Hiyama was tormented for 5 years because of something that was inevitable, yet he was demeaned by it. If Sagawa truly consider himself a friend to Hiyama, he would've helped him mentally and emotionally, yet he felt so proud of being promoted to a higher job rank. Fuck outta here, man. Despite everything, thank God the re-encounter Hiyama had with the seme (i forgot the name) started to change everything. Fuck Sagawa man, istg. Also the seme having a kink of that sort seems a bit weird to me; it felt like the author made him that way just so that Hiyama have something related to the seme lol
Attachment Love