あの頃の青い星1

Umi is drawn to Segawa, a girl from her school, whose aloof behavior blinds others to her passion of the sea. What was initially a desire for friendship grows quickly into curiosity and confusion, as Umi develops a crush for the girl who sneaks out every night in search of a mermaid.

A very cute and short read. The relationship between the two girls is very cute and genuine. The subtleties in the art and conversations really draw you in. The atmosphere is so well done, you could really hear the