Yamada-kun to 7-nin no Majo Episode 6

Yamada learns of a "witch killer", someone who can take away a witch's power. He tries to get further information from the student council president Haruma Yamazaki, but his secretary, Mikoto Asuka captures and ties Yamada up. He learns that Asuka is a witch who becomes invisible to whomever she kisses. Shiraishi and Ito talk wih Asuka and learn about her background: that she does not like being stared at by guys, so she learns martial arts. Meanwhile, Miyamura distracts Yamazaki so that Yamada can check the office for the notebook. When student council exec Isobe arrives, Yamada swaps places with him. They learn that Yamazaki likes Asuka because she is willing to do anything for him. When told this, Asuka sneaks a kiss on Yamazaki but they discover she does not turn invisible to him, which makes him the witch killer. After an inadvertent kiss by Sarushima, Yamada gets a vision where Shiraishi sadly follows Isobe; he freaks out when he realizes he is in love with her.