My Youth Romantic Comedy Is Wrong, As I Expected Novel Volume 12 is written by Wataru Watari with illustrations by Ponkan 8.

After the Valentine’s Day event and trip to the aquarium, Hachiman, Yukino, and Yui decide their next step to take. But suddenly the Service Club receives a huge request! Yukino 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. But until that day comes, there is only the present. What is the answer that these three hold close to their hearts?