Mysterious Girlfriend X (2012)

S1E3 The Mysterious Test Tube

When Tsubaki stumbles upon Ueno and Oka sharing a kiss, Ueno pleads with him to stay silent about it. This encounter sparks an obsession in Tsubaki's mind, leaving him preoccupied with the idea of kissing Urabe. As he grapples with his feelings, he races against time to express his emotions before Urabe potentially accepts Ogata's invitation for a date. Will Tsubaki manage to act on his feelings before it's too late?