Uchuu de Ichiban Kimi ga Suki

Minoru meets Sola, a space alien who's come to Earth to find a bride. Since their first encounter, Sola's had his heart set on Minoru as his bride-to-be. Sola's initial advances are sweet, but they gradually escalate to a passionate kiss!

(Source: Renta!)

Included one-shot: Koisuru Kaori