My Youth Romantic Comedy Is Wrong, As I Expected, Vol. 12 (light novel) — Wataru Watari

WHAT DOES THE FUTURE HOLD FOR THE SERVICE CLUB? After the Valentine's Day event and the trip to the aquarium, Hachiman, Yukino, and Yui decide on their next step-but suddenly, the Service Club receives a huge request! Yukino feels she must answer the call, even if she regrets her choice… Everyone has to grow up someday, and not every person you meet along the way will stay with you. Until that day comes, though, there is only the present. What answers to their dilemma do these three hold close to their hearts?