It's Probably Because This Is the Best Boob Bag Here (S01E05)

Wakana has successfully finished the Shizuku cosplay, and Marin is thrilled to embody her favorite character, Shizuku-tan. She proposes that they attend a cosplay event the following day. Despite it being her first experience at such an event, Marin finds herself inundated with photo requests. As Wakana observes Marin's excitement, he is flooded with emotions, feeling a mix of pride and admiration for her. However, he struggles to process his own feelings as the day unfolds.