[From Maboroshi]:

Satsuki, to whom he said some incredibly disrespectful words to, had the worst reunion with him in the high school entrance ceremony! He was the little master of a famous construction company...? A love story of the season of sakura, where things become precious and love forms!

This volume also contains a side story entitled Only You.
Kiku-chan has an onesided love for Inoue Ken. On the day that Kiku finally decides to confess to Ken, she finds out that another girl has already confessed to him.