Cast: Takarai Rihito

In the story, there are certain individuals known as "graineliers" who produce "seeds" that conceal various powers. A boy named Lucas lives at his disposal with the powers from these "seeds."

The successor of the Tsujimura clinic, Motoharu has always held his childhood friend, Hazumi Akira, close to his heart. He confessed to Akira and then was rejected. Even so, he still entered the same university and same department as Akira. Ever since the confession, the two have been distancing each other, but Akira suggested that they make up and for the first time in a while, they walk home together. But on the way back, Akira suddenly kisses Motoharu, causing Motoharu's hope to grow. However, the next day, Akira tells him to “forget it”, causing Motoharu to blame Akira...

Youichi's life at university is going just fine. He isn't having any trouble with his classes, he has plenty of friends, and even a cute girlfriend named Minami. Then the day comes where he meets Misaki. Misaki is a reserved, stand offish fellow but for some reason, Youichi can't seem to get him out of his mind. In fact, he can't seem to stay away. When he lands a job working in the lab with Misaki, it seems more than just the flowers are about to bloom. But will they recognise their emotions for what they are, and have the courage to accept it?

Bright and early one Monday morning, Shino Yuzuru asks Seryou Touji out on a lark when they run into each other at the school gate. Seryou, who's immensely popular, has the odd habit of going out with anyone who asks him out first at the beginning of the week, then promptly dumping them at the end of it."Anyone" apparently includes male upperclassmen like Shino, and as a boyfriend, Seryou is perfect--unfailingly thoughtful and kind. Shino, obviously, has no intention of being in a serious relationship with Seryou. It's not like it's actually love or anything like that. ...Right?

16-year-old Kizuna stalks the city at night, flirting with middle-aged salary men and coercing them out of their money. The thrill should be enough to satiate her, but Kizuna remains unsatisfied with her everyday life… That is, until the beautiful Inoue Yuki, also living in “... 

In the story, there are certain individuals known as "graineliers" who produce "seeds" that conceal various powers. A boy named Lucas lives at his disposal with the powers from these "seeds."

A short sequel for Hana No Mizo Shiru portraying Misaki and Youichi's life after the events of the main plot.