Danshi Koukousei wo Yashinaitai Onee-san no Hanashi - Vol. 2 Ch. 42 - Deranged Onee-san

[MangaDex]

 

[Sam1986]

Idiot boy that was your chance to hug Onee san and cuddle her

 

[Namek250703]

Drunk Onee-San is a top tier character.

 

[LewdSumi]

wait what if the friend bringing the sake and asking to touch her boobs was a ploy. The MC already knew that she would do anything for him, so what if he devised a plan that directly pivots off his friend for him to get an opportunity to touch her boobs. (this is based of "the operation failed" quote)