Hazuki, working for stationary manufacturer for a year, dates Satoru, held back at university. Things haven’t been going well between Hazuki and Satoru, and Hazuki starts dating Yasuda whom she met at the matchmaking party. On Valentine’s day, Hazuki handed chocolate to Yasuda which meant that he was her most favorite. In return, Yasuda gave her earrings on a White day. But after receiving a present from Yasuda, Hazuki realizes something very important. When she opened her post after coming back from a date, there was a present from Satoru