Tezuka's first kiss is with Fuji. It's in his second year of middle school and it is probably perfect. Perfect, except Tezuka doesn't feel a thing. Fuji shrugs and walks away and they never talk about it again.

Tezuka's last first kiss is with Echizen on a street court in Germany, it's messy and imperfect and all Tezuka can think about is how right it is.