Runako Tsukimi

Eiyu's other childhood friend, who's younger than him by a year. She moved away from the neighbourhood 5 years before the start of the story, but moves into his house to attend high school. She's the most energetic and high-spirited person in the cast, to the point she's sometimes jumping in place. Her name is Runako, but her friends shorten it to Runa. Eiyu's not really her brother, and he's only a year older, yet her attraction to him makes him and the others uncomfortable since she's constantly calling him her "big brother". Since she's younger than the main trio by a year, they all trea...