4. Heart Knocker

As Kyōko remains spaced out over the previous day's events, Popura tries to act more reliable to fill in for her, while Mitsuki tests Jun to see how compatible he is with Yachiyo. Meanwhile, Sōta is bewildered over suddenly finding Mahiru to be cute, outright denying Kirio's suggestion that he might be in love with her. While trying to compliment Mahiru on how much she's improved with her anthrophobia, Sōta inadvertently upsets her by suggesting she find someone else to fall in love with.