Komi Can't Communicate, Vol. 18 by Tomohito Oda

[Viz] The journey to 100 friends begins with a single conversation. Socially anxious high school student Shoko Komi’s greatest dream is to make some friends, but everyone at school mistakes her crippling social anxiety for cool reserve. Luckily she meets Tadano, a timid wallflower who decides to step out of his comfort zone in order to help her achieve her goal of making 100 friends. The culture festival might have been a huge success, but Komi and Manbagi are still reeling from the shocking discovery that they both like Tadano! When everyone goes to karaoke after the festival closes, the girls see a perfect opportunity to woo their crush. Too bad neither of them can sing!