Tsurumaki Machi: Natsu Jikan

On the last day of school, Mitsuru, a primary school student who has the power to talk to plants waters a forgotten water hyacinth in his classroom. Since then, strange incidents start occurring in the town of Tsurumaki.

A story of summer vacation in a nostalgic and warm world, drawn by a genius.

(Source: Shinchosha, translated)

Note: Contains an epilogue.