Totsuzen, Planter kara Ikemen ga Haetekitanda ga.

Kouta is an ordinary college student who grows flowers and vegetables on his veranda. One day, he found a good-looking guy had sprouted in his planter!! He calls himself Flower, and just asks for water... Kouta doesn't believe it, but he can't just leave him, so he decides to take care of his "Flower." Please enjoy this unusual story of a cultivated boyfriend.

(Source: Renta!)