First-year high school student Uka Ishimori wants a fresh start. In middle school, Uka was given the nickname Rocky by her peers, being misunderstood as having no emotions when she was actually shy and introverted. As a result, Uka was relentlessly bullied and experienced a lonely, isolated school life. Now, Uka is determined to change. During the first week of school, Uka accidentally gets drenched in lemon soda by her classmate Kai Miura—whose cool personality is the complete opposite of hers. After the incident, Uka is surprised when Kai performs small acts of kindness for her, encouraging her to gradually break out of her shell. Like a lemon soda, bubbly and exciting feelings are beginning to stir.

Eager to know why her best friend’s boyfriend dumped her for a man, the headstrong Eiya Arakawa suggests a meeting with them. Gathered together at a café, Yuuga Oota agrees to answer Eiya’s questions only if she can correctly ascertain the relationship of a couple sitting across from them, which she does on her first attempt. Amazed by her astounding intellect and intuition, he invites her to a private meeting where he introduces her to the concept of Slave Control Method, or SCM, a retainer-like device that has the ability to turn people into slaves. When two SCM users enter a duel, the devices exert a powerful influence on their brains. Once the duel is over, the SCM amplifies the loser’s sense of obligation and forces them to bend to the will of the winner. Wanting desperately to test his own abilities, Yuuga asks Eiya to act as his insurance in the event that he himself becomes a slave. Granted access to 10 million yen, Eiya’s job is to convince Yuuga’s would-be master to free him from his servitude. Though hesitant at first, Yuuga’s words resonate with her personal yearning for something more from her life, and she agrees to his request. However, when a mysterious organization begins rapidly accruing slaves, Eiya becomes entangled in a game far more dangerous than she ever could have imagined.

Hazumu was a shy boy who enjoyed gardening, collecting herbs, and long walks in the mountains. One day he finally worked up the courage to confess his love to Yasuna, but she rejected him. Depressed, he wandered up Mt. Kashimayama, the place where they first met, to reconsider his feelings. After getting lost, he wished upon a shooting star and received a bizarre twist of fate. Now he is a she, and she stumbles headfirst back into social life and relationships only to find that the entire landscape has changed! (Source: Media Blasters)

Yuna Ichihara's spring break is far from pleasant, especially after she sends off her best friend Sacchan, who is moving away. But while heading home, the timid girl brightens up when she encounters a boy who looks exactly like her first love—a prince from a shoujo manga. Subsequently, she finds herself in a peculiar situation with the mature Akari Yamamoto, a new neighbor who immediately befriends her. Now attending the same high school together, Yuna shows interest in Akari's brother Rio—the same mysterious and handsome boy she met during spring break. Likewise, Akari is falling for Yuna's carefree childhood friend, Kazuomi Inui. However, love is not at anyone's fingertips, as the relationship between these four contrasting friends faces complications, preventing them from moving forward. To discover the truth between them, they will need to confront their own struggles and uncover secrets hidden among themselves.