Majo Rumika no Akai Ito

A student council member named Haneda Kotoya is unexpectedly pushed from behind and trampled. Confused, he hears a girl say, "Finally I found a man who really loves me." The girl, Kirima Rumika, continues to trample him repeatedly. She also restrains another class rep, Mizukoshi, in a classroom chair overnight, claiming it is for Kotoya's benefit. Rumika and Kotoya share class rep duties, and she frequently neglects her responsibilities. The nature of Rumika's intentions remains unclear.