My Youth Romantic Comedy Is Wrong, As I Expected @ comic, Vol. 12 (manga) — Wataru Watari

Hachiman, Yui, and Yukino are back on the same page (more or less), and now the Service Club can devote its full attention to salvaging the joint Christmas event with Kaihin High School. But even they're having trouble with the stranglehold Kaihin student president Tamanawa has on the planning, with his endless parade of pointless meetings! Hiratsuka-sensei might hold the key to breaking through, and it's...tickets to Destiny Land theme park?!