Okubyoumono Ni Hanataba Wo summary:

Kaoru Yase is a third-year college student and part-time florist doing his best. Running late to class one day, he accidentally bumps into professional pianist Kouichi Sumizome and spills his drink onto the pianist's sheet music. While Koichi easily waves off everything as an accident, Kaoru is adamant about reimbursing him for the damage done. After a few stubborn tries, Kouichi relents Kaoru's offer of a personalized bouquet. Does a friendship then bloom between the two or maybe something more?