This isn't toxic....Jaehan simply wanted tae to notice his existence...it just came out the wrong way...he wanted him to love him just like he did jaehan did when they were in elementary school...seeing Tae remembered Kim Jaehan and not Doh Jaehan triggered his trauma created by his parents...at least he realised he was wrong...Unlike most other stories where Seme is portrayed as an emotionless brute incapable of even saying sorry....Jaehan is far humane!