Series by 満井春香

High school sophomore Mizuho Nishino is having the worst 17th birthday imaginable. Her crush on a senior seems out of reach, her parents forget the occasion entirely, and a mysterious illness cancels school events, leaving her feeling like her dreams of a sparkling youth are slipping away. But everything changes when her childhood friend, Kizuki Hazawa, suddenly declares himself her "boyfriend candidate." Surrounded by four handsome childhood friends, Mizuho finds herself caught in a whirlwind of emotions, friendships, and unexpected confessions.

Summer-born Kaoru is an ordinary high school girl with no particular talent or passion—until her brother, the coach of the boys' volleyball team, ropes her into being the team's manager with the sole mission of recruiting the elusive yet talented player, Nagisa. Reluctantly, Kaoru sets out to persuade Nagisa, only to find herself captivated by his dedication and the vibrant energy of the team. As she becomes more involved, Kaoru discovers the joys of volleyball and the warmth of newfound friendships. Amidst the hustle of club activities and the pulse of youth, she unexpectedly finds her heart stirring with feelings for Nagisa.