- Bonus Material: Volume 8 of the manga contains an "activity supplement" with some trivia info, a resume of important subplots of the story (up until that point), terms used in the series, basic Kansai dialect's phrases, etc.
- Celebrity Voice Actor: Otani is voiced in the anime by singer and actor Akira Nagata, who is mostly known as Seigi Ozaki, in Kamen Rider Den-O. Otani is one of his few voice acting roles.
- Dawson Casting: Everyone in the main cast of the live action movie much older than their characters' supposed ages. For example, Teppei Koike (Otani) was 20 years old when the movie was released in 2006.
- Non-Singing Voice: In the anime, the vocals for Umibouzu's songs are provided by Smokey Tetsuni (from Crazy Ken Band) instead of Hisao Egawa, his voice actor.
- The Other Darrin: The cast from the the Drama CDs and the PlayStation 2's videogame differ in some aspects from the anime.
- Koizumi has been voiced by Risa Hayamizu (Drama CD) and Akemi Okamura (anime).
- Otani has been voiced by Takahiro Sakurai (Drama CD) and Akira Nagata (anime).
- Nakao is voiced by Kenjiro Tsuda (Drama CD) and Yasuhiko Tokuyama (anime).
- Suzuki is voiced by Masaya Onosaka (Drama CD) and Kenjiro Tsuda (anime).
- Haruka is voiced by Ryotaro Okiayu (Drama CD) and Masaya Onosaka (anime).
- Portmanteau Series Nickname: The series is also known in Japan and overseas as "Love Com". Sometimes, it also includes a star in the middle space of the two words.
Trivia / Lovely Complex