Tomoya finds out Rena's secret when she suddenly runs into him. She asks him to be her pretend boyfriend to learn about relationships, but does he have his own agenda? He is extremely popular at school with the girls, and even though many have asked him out, his reply was always no. It is hinted that his older sister, who is a famous mangaka, influenced his personality. When Rena asked him why he didn't have a girlfriend, this was his reply: "I'm only going to date someone I'm interested in." The truth was that he was talking about Rena. Tomoya became mad when Rena told him that he seems to be a main hero of a sh�jo manga because he wants her to see him as a real person. He also confesses his love to Rena. In the future, Tomoya marries Rena and they have a son named Hiroki.
Azusa is the science officer and experimental biologist in the TAC. Azusa is rarely on the field due to her research and development background. She constructs biological weapons for the TAC to use against the Aragami. She is a divorced mother, her son Jun lives with his father. Source: Wikipedia
One of Makoto's work colleagues. Not married. Envies Makoto because of the beautiful wife he has. As well as Okahama sometimes acts like a pervert. Is not really attentive to his sex partners (which is discovered during the girls' talk about the worst types of men).
One of Makoto's work colleagues. Not married. Has many fantasies about women and often says vulgar things making Makoto blush. Okahama himself thought he was good at sex until girl colleagues started to discuss the types of men they hated most. Then it revealed that he had a lot of problems, f.e. thought only about himself.
Makoto's father. A 52-year-old company officer. He is overly sensitive about his sex life, and far too protective of his youngest child, Jun. (source: http://en.wikipedia.org/wiki/Futari_Ecchi)
Makoto's elder brother. A 29-year-old lawyer. He is very nosy and frequently pesters Makoto about his sex life and fancies himself as Makoto's tutor on the topic of pleasuring women. In order to appease his own sex drive, he frequently visits brothels. Is used to speak in an extremely loud voice which (along with the topic Akira usually covers) makes everyone embarrassed.