Book Name:KOI. - ITOSHII ITOSHII TO IU KOKORO Manga
Alternative(s):
いとしい いとしい というこころ; 戀。; Itoshii; Itoshii - Itoshii Itoshii to Iu Kokoro; Itoshii Itoshii to Iu Kokoro; Koi (SAKURA Roku); Koi - Itoshii Itoshii to Iu Kokoro
Summary:
From AQUA Scans:
During the entrance ceremony of high school, while looking at the rainbow after the rain, the main character Haru met, an unusual girl with an aura of 「air」-?