Steady Study (TAMURA Kotoyu)

From Chibi Manga: Love at first sight means bad luck for her so Koyori can't find real love. The same thing can't happen again!!...she decided but just when she did so, she meets Mine during summer classs and falls in love at first sight again!? But Mine is different from the guys up until now, he's pure and straight forward and Koyori's heart can't stop loving him!?