Tsumugi, who works at a café, has a regular customer who interested her. She is a woman who seems to be an office worker, who orders a cup of bitter black coffee every day. One day, Tsumugi thought to herself, "If I drink that much caffeine every day, it wouldn't be good for my health..." (Source: Melon Books, translated)
Ayu Inui
MangaSlick
