It was about halfway into summer and everyone was just chillin in the common room. Kiri and Mina were going around doing a tik tok. They walk over to Shinso

Mina: "Looks intimidating until they smile" She then uses her fingers and makes Shinso smile and he actually looked really sweet

They walked away smiling leaving him confused. They then walked over to Shoto and did the same thing making him look really sweet before walking over to Bakugou. It took Kiri five minutes of persuasion before he got Bakugou to smile and everyone in the room felt so happy when he did because it was adorable