Amakusa Rio (天草理緒, Amakusa Rio) is Amakusa Ryou's sister and the best friend of Arima Ichika. Rio invited Ichika at her place when her older brother Amakusa Ryou returns, he is surprised to see Ichika and states that she saved his life today. Rio is interested to know more, however as her phone rings, she goes in the other room to speak with her mom. Returning to them, she is surprised to see Ryou confessing to Ichika.
Koikimo
The story follows the relationship between Amakusa Ryou, a sex-crazed but highly eligible bachelor with a wandering eye for women, and Arima Ichika, an ordinary otaku high school girl who is close friends with Ryou's little sister Rio. Ryou and Ichika meet by chance one day, but Ryou's direct approach — asking Ichika for a kiss and a date on the same day they meet — is a complete turn-off for Ichika. Despite Ichika's disgusted reaction (or arguably because of it), Ryou is convinced that she is the one. [ANN]
It's Too Sick To Call It Love (Manga)
The story follows the relationship between Amakusa Ryou, a sex-crazed but highly eligible bachelor with a wandering eye for women, and Arima Ichika, an ordinary otaku high school girl who is close friends with Ryou's little sister Rio. Ryou and Ichika meet by chance one day, but Ryou's direct approach — asking Ichika for a kiss and a date on the same day they meet — is a complete turn-off for Ichika. Despite Ichika's disgusted reaction (or arguably because of it), Ryou is convinced that she is the one. [ANN]
