To me, he refused the help with the cleaning because he wants to keep a fragment of Taesung after they part (which seems to be the plan for Bombom). In Dangerous Convenience Store, the MC tries to keep the ML’s cum inside him, saying he doesn’t want to waste it. it feels like a similar type of thinking.
In the last chapter when we saw the flashback, Red told him that “he was sterile anyway and he was useless so he might as well k*ll himself”. This is gonna sound crazy and maybe not make a lot of sense but our brains are incredibly complex and when its mental health gets affected by deteriorating, a lot of non sensical things can happen. What if he kept wanting to get filled to the brim and keep the cum because he wanted to get pregnant or smth like that? I don’t know the real psychology behind it, and I could be way off, but this happened right after Haebom had that flashback

I hope hope HOPE the author won't make a plot where Haebom was onced r*ped by those guys would they???? Ngl I have a bad feeling seeing Haebom refuses aftercare from Taesung.... Hahaha just my delusional ass... Yes...