Blue Box manga volume 11 features story and art by Kouji Miura.

Taiki wins a grueling test of endurance against the cool Matsuoka to secure a ticket to Chinatsu's next basketball game. But he plans to give his prize to Yumeka, hoping she'll acknowledge the hardworking Chinatsu he's come to know and love. Will Taiki's efforts help Chinatsu mend this strained relationship?

Blue Box manga volume 12 features story and art by Kouji Miura.

Winter break is rolling in, but Taiki and Chinatsu won't be spending it together. Despite a ski trip with his badminton buddies to keep his mind off her, Taiki holds on to the faint hope that he'll be able to see Chinatsu before school starts again. The time apart has only intensified his feelings for her - and Taiki finally decides it's time to act!

Blue Box manga volume 13 features story and art by Kouji Miura.

Taiki is preparing to celebrate his 16th birthday surrounded by family when an emergency leaves Chinatsu and Taiki alone together! What kind of present is Chinatsu cooking up for him? And will Taiki's heart be able to handle it?

Blue Box manga volume 14 features story and art by Kouji Miura.

With Valentine's Day fast approaching, an unusually stressed-out Ayame fusses over giving special chocolates to Kyo. Can she follow through despite her fear of rejection? Then, a new school year starts, bringing with it promising first-year athletes. The newest member of the boys' badminton team makes a bold declaration that Taiki won't soon forget!

Blue Box manga volume 15 features story and art by Kouji Miura.

With nationals approaching, Taiki looks for ways to push himself harder than before. He decides to turn to Hyodo, who puts him through a spartan training! Then, qualifiers begin for the girls' basketball team. Chinatsu leads them through the bracket without breaking a sweat - until she faces off against Yumeka for a spot at nationals!