This chapter has cemented this manga as GOATed for me, its treating the characters like people, and exploring how fucked up they are without the same indulgent edginess that boys abyss and chi no wadashi and similar titles do. It has a tone similar to Bokutachi ga Yarimashita or a lighter Oyasumi Punpun, but like, somewhat less flanderized trauma porn.
Might be going out on a limb with this interpretation, but specifically the line that calls out a warped sexuality being a norm in Japanese culture really cements this mangaka as conscious of both the international audience that the manga industry serves, and the narrative tone that see's the plot as a problem and is not attempting to glorify/normalize/indulge in the fetish content like other manga does (like the spit girl one or the many panties one or the teacherxstudent ones and so on).