Haibara's Teenage New Game+ Volume 5

Natsuki’s high school life is going just as planned: the cutest girl in school is his girlfriend, he’s friends with the popular kids, and he’s made his mark by giving one banger of a concert. Sure, those friendships have become a bit more strained, and he doesn’t know how the heck dating works, but practically speaking, he should be delighted with his overall success... So why is he doubting the path he’s taken? Isn’t this the rainbow-colored youth of his dreams? While Natsuki struggles to navigate his relationships, the school ball game competition quickly approaches—can he turn this into an opportunity to sort out his emotions and strengthen his bonds?

[From J-Novel Club]