Too Many Freaking Secrets! - S1.E6

Satsuki suddenly starts acting all couple-y in front of Mai, much to Renako's confusion. After seeing an unexpected side of Satsuki, Renako dares to admit she's actually an introvert, only to find out Satsuki already knew. Shocked, Renako runs off, but Satsuki finds her, and somehow she ends up spending the night at Satsuki’s place.

Are they really taking a bath together too!?

Wait, why!?