This series has 5 movies released so far, all of them based on the novels by Shinobu Gotou. All 5 movies were on theaters before being released in DVD (5th movies DVD will be out on January 2012).
The stories are on shounen-ai level, no nudity, no explicit scene. The development is set basically around Takumi and his relationship with his lover and his friends. Takumi has a story of abuse on childhood and difficulty to socialize with school mates.
Curiosity: Many of the actors that worked in the series were in some of the casts of The Prince of Tennis Musical, like Daisuke Watanabe and Ryoma Baba.
#1 - Takumi-kun Series: Soshite harukaze ni sasayaite (2007)