Hen na Nee-san - Vol. 1 Ch. 4 - Professor and Me

[MangaDex]

 

[mmosimca]

This is a bizarre manga that intentionally uses vague textboxes in order to trick you into believing the characters are the wrong people. Near the end, the textboxes start getting indicators, so you can see who's talking and realize your mistake.

 

[jellu]

Holy fuck, after the ending, re-reading it changed the whole things, the things that one implied while reading it.