High school student Midori is in love with his reserved and cool friend, Kano. Yet he is unable to confess his growing passion. When Midori decides to study aboard, Kano starts to avoid him. Not knowing the reason, Midori looks for a shoulder to cry on and finds it in his cousin Hanabusa, the resident math teacher. But Kano isn't avoiding Midori because he doesn't like him. Far from it!

Poor Mugi Tadano... The sixteen-year-old is heartbroken after his girlfriend moves away. To ease he troubled state, Mugi takes a summer job at his friend Kazuki's beachside snack bar/hotel on a tropical island. It seems like the perfect plan - until Kazuki sets Mugi up on a date with Yuu, who's supposed to be, well, a little less than perfect.

Mugi's crush on Yuu has taken him on a roller coaster of emotions, but after he’s taken the time to think about Yuu's special birthday gift, maybe things will get back to normal. Maybe.

When Mugi's dad is called away to work, he leaves behind his new fiancee, a cute young hottie named Mako-chan. Sounds like the perfect opportunity for Mugi to get to know his new mom. The only thing is, Mako-chan seems a little bit too affectionate - and it's driving Mugi's crush, Yuu-chan, crazy with jealousy!

It's summer break and Mugi and the gang are spending it at the beach. Mugi has made up his mind to finally tell Yuu how he feels about her, but it's not an easy task. Luckily (or maybe unluckily), Mugi's best pal, Kazuki, is there for support. Kazuki enters Mugi and Yuu in the Best Couple Contest in hopes of putting them in the mood. But Mugi and Yuu end up with more than they bargained for!

Just when Mugi is finally ready to make a move on his crush/roommate, Yuu, Mugi's ex-girlfriend, Hinako, shows up out of the blue and cuter than ever. Hinako claims to be in town visiting colleges, but it seems she really just wants to flirt with Mugi. Suddenly, there's an odd tension in the air. Will Mugi mess up his big chance with Yuu?

Mugi and Yuu have been living together for three years, but Mugi still hasn't told Yuu that he's in love with her. Mugi is afraid that if Yuu turns him down, the situation at home could get uncomfortable, to say the least. But with a little encouragement from an old pal, Mugi decides that it's time to make his move!

When Mugi meets the gorgeous Yuu, it's love at first sight. Imagine Mugi's surprise, then, when he learns that they'll be shacking up under the same roof along with Yuu's cute and curious little sister. Just when Mugi is finally starting to get used to the idea of living with his dream girl, a third wheel rolls in.

Mugi seems like the luckiest guy on the face of the Earth. He's only a teenager, and yet he's sharing close quarters with Yuu, the cutest girl he's ever laid eyes on. But when Yuu and Mugi attend their first day at school, Mugi encounters some unexpected competition.

Kiku can have any guy she wants. Now she's set her sights on Mugi Tadano and only one thing stands in her way: Yuu Tsukisaki. Kiku's solution? Destroy Yuu Tsukisaki by any means necessary. When Kiku unleashes a series of hurtful rumors about Yuu, it's up to Mugi to clear Yuu's name and save her reputation. But can Mugi resist the charms of the sexiest girl in school?

When Mugi and Yuu miss the last train home after a late night out, a friendly restaurant proprietor, Tetsu-san, invites them in from the cold. Impressed by Mugi's passion for cooking, Tetsu offers him a job... Which is how Mugi comes to meet the gorgeous eighteen-year-old Aoi-san, a wandering artist (and kissing machine) who is deeply in love with Tetsu.