Ep. 10: Riki seeks the final Little Busters member while investigating Mio's mysterious habits and lost book.

10

Riki must locate the last missing member to complete the Little Busters baseball roster. After accidentally hitting Mio with a foul ball, he visits her the next day with a compress. He observes that she always carries a parasol and reads under the same courtyard tree, leading classmates to label her "shadowless" due to her low presence. Wanting to help her as Kyousuke and others helped him, Riki invites Mio to join the group, but she refuses. Later, Yuiko asks Riki for assistance in finding a missing book. They search the classroom without success, suspecting a prank, but the situation resolves when the girl who took the book returns it. Finally, the Little Busters members summon Riki for practice, and Mio goes to watch them play.