Onegai☆Teacher: Reminiscence Disc

Kei Kusanagi's life changes when he discovers that his new teacher, Mizuho Kazami, comes from space. A succession of misunderstandings leads them into a marriage they must keep secret, even as Kei continues attending school and Mizuho maintains her public role.

The arrangement gradually becomes a genuine emotional bond, complicated by Kei's condition, which can bring his life to a standstill. Friendship, jealousy, and the need to conceal Mizuho's identity test their trust as they learn what it means to move forward together.