Yotsuba finds herself entranced by the way Fuutarou smells post-workout. When he's busy showering, she finds a way to enjoy his scent erotically - and the two soon learn they have a lot in common once they have sex. Has Chap. 78 or Ep. 10 of season 2 mentions.

From the perspective of Nino Nakano, you wake up with a pimple on your face that doesn't budge. Not wanting Fuu-kun to find out, you make a myriad of plans to hide it. General spoilers for season two.

After masturbating, Ichika just can't stop thinking about how Fuutarou is staying over at the quintuplets' home and how this is an opportunity to do something. So, disguising herself as Miku, she has her way with him in the quiet midnight of her moonlit room.