[DeepL Translation - needs review] One day, an ordinary high school girl, Umi Kakimoto, falls in love at first sight with a beautiful girl in the next class, Akira Segawa. Umi is puzzled by her feelings, but she hopes to become friends with Segawa, who has a mysterious air about her...
A little bit of obligatory drama, and a nice ending (and omake) :)
(I originally thought this was the end of the series, but turns out there's another volume!)