As the final days of their 2nd-year approaches. Kaidou and the gang plan to go on a trip but unfortunately, the world-threatening volcano erupts on the same day.
Kokomi and Chiyo meet each other at a cafe, but when they start sharing details about their crushes, they realize they could both be competing for Saiki.
Kusuo unintentionally goes back to that time. Kusuo then attempts to right the timeline. Kuboyasu receives a love letter which turns out to be a trick. Kusuo goes shopping for clothes and ends up playing dress-up with Teruhashi.
Kusuo's friends try to celebrate Christmas at Kusuo's house. Kusuo watches various television shows, which feature his friends and family in some way. Toritsuka joins tennis team. Kusuo transforms into a girl to attend a women-only buffet.
Saiki comes across a ring that blocks his telepathy, which he hopes to use to watch a movie without any spoilers, but he finds it a challenge and ends up sitting next to Teruhashi.