Younger Seme - Older Uke

Serizawa is your usual nice young man working at a bookstore, when one day he chances upon a strange customer. Immensely tall and intense-eyed, this stranger is a shock for Seri at first sight. That is, until upon further observation, Seri realises that the tall stranger is in reality, a painfully shy and gentle young man named Keito. As the two youths meet more and more often in the bookstore, they begin an earnest and sweet friends or more (◕‿◕)