Hatsu*Haru Series by Shizuki Fujisawa

Playboy Kai definitely knows his way around girls' hearts, but when he has a run-in with tomboy Riko, he may get more than he bargained for! Riko clearly doesn't fit Kai's usual type of girl: She's short-tempered, scary, and can (has) easily beat him up. There's no way a rough and tumble girl like Riko is capable of such a delicate feeling as love! So imagine Kai's surprise when he finds out about her secret one-sided crush... But it's none of his concern, right?

Riko is the last person on earth Kai ever thought he would fall for, but he can't deny it-he's in love with her. Being the ever-popular Kai, he's sure there's no girl who wouldn't be ecstatic to date him...so when the school trip doesn't go his way, Kai's at a loss about what to do. Time for his friends to swoop in for the rescue! A well-planned group date to the amusement park gives Kai a chance to spend more time with Riko. But what exactly does true love mean...?

They say idiots don't catch colds, but Kai sure has been lovesick over Riko. There's a fireworks festival around the corner, but instead of asking Riko along, he decides to just not go! When class-representative work keeps them late at school anyway, it looks like the perfect chance for Kai to collect his feelings and confess...With summer vacation approaching and fireworks booming overhead, will the feelings Kai has precariously kept under wraps finally explode?

On the heels of his inadvertent slip (which went right over Riko's head), Kai's spiraling into depression all over again. He's so befuddled with thoughts of Riko, he even fails one of his finals! While he's preoccupied with makeup exams, his friends are still determined to make Kai and Riko a couple. So when a study group is formed, guess who turns out to be Kai's tutor...Will this study session cover an extra subject-love?!

Kai just can't shake his feelings for Riko, no matter how hard he tries (or how many other girls he dates). When it comes to first loves, though, Riko knows better than most how hard it can be to let things go. With Suwa and Akemi's wedding fast approaching, will Riko be able to finally tell her most important people a heartfelt congratulations and move on...?

Summer break has been full of endings and new beginnings for Kai and Riko both. Suwa's wedding saw the conclusion of Riko's long-held first love, but only time will tell if its departure leaves room in her heart for another. Can Kai safely navigate dating when love is involved, or will his uncalculated swing in the dark throw everything off course?

Kai's finally done it-he and Riko are officially going out! But after a disastrous first date, Kai continues to have trouble with his new relationship...No matter what tried-and-true suave moves he uses, finding just the right moment for the first kiss is turning out to be a lot harder than he thought. But Riko isn't like any girl he's dated before, so he's going to have to dare to try something new!

Thanks to Riko's heroic instinct, she took first prize in the Hottest Guy Contest and won a trip to a hot-spring resort. Kai has been eagerly awaiting their romantic getaway, but unfortunately for him, the dream trip for two has suddenly become a group affair. With Shimura and Misaki tagging along, alone time has dwindled to a thing of mere imagination. Odds take a turn in the boys' favor, though, when Shimura insists on sleeping in Misaki's room…The hope for intimacy may not be lost, after all!

The start of the school year brings unexpected trouble for Kai, as the new semester's class assignments mean he's no longer in the same class as Riko. Their time together has been drastically cut, but Riko is completely unfazed, to Kai's dismay. Luckily, the school trip is right around the corner, and there will be plenty of time for relationships—even if it's not their own they're working on!

While the class trip may not have been a slam dunk for Kai, Kagura finally accepted her true feelings and confessed to her childhood friend Tora. With nothing left to hide, she’s ready to move on, but womanizer Tora suddenly finds he’s at odds with himself! Luckily for him, reformed playboy Kai knows exactly how to help...

Kai and Riko’s relationship has finally progressed to their first overnight trip alone. Everything was going perfectly, until Kai shocks Riko with a confession...What will come of their vibrant young love? Kai and Riko’s love story concludes in this final volume of Hatsu*Haru!