Ginta Suou

Miki's best male friend and a member of the Toryo tennis team. Miki has had a crush on him since junior high and once confessed her feelings to Ginta in a note. However, the note was found by Ginta's classmates, and Ginta downplayed it although he also felt the same way about Miki, without knowing at the time that she was watching.

Although he did find out that Miki had witnessed his denial of any interest in her, he was unable to tell her how he really felt until high school. The romantic tension between them comes to a head with Yuu's appearance, which makes them realize that they still have feelings for each other. He decides to go along with Yuu's ex-girlfriend Arimi's proposal that they pose as a couple in order to drive a wedge between Miki and Yuu. In the process however, he starts to develop genuine feelings for Arimi, which she later reciprocates.

(Source: Wikipedia)