14歳の恋 / Love at Fourteen Series by Fuka Mizutani

Middle schoolers Kanata Tanaka and Kazuki Yoshikawa are mature beyond their years, perfect model students admired from afar by classmates and teachers alike. But when school's out, these two childhood friends can let loose as average fourteen-year-olds, fresh in the throes of puberty, adolescence... and the persistent, bittersweet pangs of first love.

Now in the same second-year class in junior high, amid the hormones and angst of adolescence, the unusually mature Kazuki and Kanata go from being boy and girl friends to boyfriend and girlfriend. But with love comes intense emotions, and being teenagers, they go back and forth bottling up those feelings. Will this approach come back to bite them?!

Kanata and Kazuki are unwittingly pit against each other during a feud between the girls and boys, and their budding relationship is put to the test when personal feelings explode their mature facades! With their perfect student reputations also on the line, can Kanata and Kazuki reconcile their differences, or will their argument become someone else's gain?

As the weather cools down--bringing with it a change of pace and uniforms--preparations for the upcoming sports festival begin to heat up. But when Kazuki is picked as an executive member of the festival committee, Kanata can't help feeling a little left behind. Will these two manage to keep up their mature smiles and endure this time apart?

On the heels of the sports festival comes the biggest middle school event yet--the school field trip! But before Kazuki and Kanata can worry about keeping up appearances in Kyoto, they'll have to pass their midterms. Unfortunately, Kazuki's math skills don't stand up to his mature, model-student appearance, so when he finds himself in a mathematical midterm pinch, he asks for a favor from none other than...Shiki-san?!