Y'all thought that's komi's n tadano daughter at start of the chapter right 
WAKE UP TO REALITY, CAUSE REALITY HITS HARD
Comment by Drunken wanderer on Komi-San Wa Komyushou Desu - Chapter 437
2 Replies
@Drunken wanderer - Nop I was more on the "Oh a second sister that they did not show until now?" x)
@Drunken wanderer nah. I Immediately just thought that she was her cousin or a relative but i get what you're saying