The main protagonist of the story. She has a secret that she is a professional mangaka who draws shoujo manga. After an accident at school, Tomoya finds out her secret, and remembering some advice from her editor, she asked him for a date so that she could learn more and improve her work.

Spoiler

However, throughout the series, she is easily embarrassed by having any contact with boys (especially Tomoya) and often turns either extremely red or melts into goo. Later on, she falls in love with Tomoya although she questions their relationship. She becomes jealous when Tomoya shoots a kissing scene with an actress (who is also a fan of Rena's works). Rena is very shy for boys but enjoys the help. In the future, Rena marries Tomoya and they have a son name Hiroki.

(Source: Wikipedia)