Obento to Kase-san. (hirari comics)

[Machine Translation] We are dating, even though we are both girls. Yamada started dating Kase-san, the ace of the track team, and in her third year, they ended up in the same class. She can't believe that she can look at Kase-san during class! As Yamada chews on her happiness, she suddenly thinks to herself, "But what does it mean to be 'in a relationship'? But how do I get together? But how do you go about "hooking up" with someone? The distance between the two slowly shrinks as they cry and laugh. A sweet and sad girls' love story about girls in love.

女の子同士だけど、私たちつき合っていますーー。陸上部のエース・加瀬さんとつき合い始めた山田は、三年になってなんと同じクラスに。授業中も加瀬さんを見ていられるなんて!幸せをかみしめる山田はふと思う。「でも『つき合う』ってどうすれば?」そんな中、沖縄での修学旅行が始まってーー。泣いて笑ってゆっくり縮まるふたりの距離。恋する女の子たちの甘く切ないガールズ・ラブ。