Yamada-kun and the Seven Witches, Volume 16 (Yamada-kun and the Seven Witches #129-137)

A New Witch in Town - Just when Yamada thought his witchy woes were over, the Student Council discovers that there’s a whole new set of Seven Witches afoot... and a mysterious, new one is bewitching students with an unknown power! Shiraishi soon falls under the witch’s spell, and as a result, tells Yamada that she wants to take a break from their relationship! Desperate to discover the witch’s identity - and win Shiraishi back - Yamada, Odagiri, and Kurosaki head towards the Student Council’s old, secret reference room to search for clues, but it may be a task easier said than done...