The male protagonist Mitsui Hisashi is a typical Gemini man. Because he has experienced some things, he looks slightly mature, but he can be very childish in front of friends, sometimes a little willful, and has a dark belly. Sunny is confident yet sensitive and has low self-esteem, cheerful and open-minded yet possessive.
The younger sister of the heroine Maki Yui, Maki Shinichi, is a typical Aquarius girl, a little sexy and cute, and warms Hisashi Mitsui like the sun.
The story also intersperses the emotional lines of other people.
Concept: Hisashi Mitsui, Yui Mu