Mitsuki Vanishes - S2.E9

When the gang goes to Mount LilyMu, everyone but Mitsuki can go on the bullet train, since Mikey cannot find Mitsuki's ticket. On the train, Mikey hears mumbles and finds Mitsuki tied up. Mikey convinces the gang to help find Mitsuki, and whoever kidnapped Mitsuki. In the subplot, Yes Man quits after a fight with Ozu.