- Cash Cow Franchise: A minor one in Japan.
- Casting Gag: Subaru's seiyuu also voices another basketball player, but one with a penchant for horoscopes nanodayo.
- Development Hell: The two games were delayed several times. The second one, Brilliant Blue, has yet to be released (finally being released in late 2013); and Passion Pink had several bugs after finally being released.
- No Export for You: So far only the anime has been officially released outside Japan.
- Relationship Voice Actor: Many of the Asahina Brothers are voiced by the same voice actors as several characters (who are coincidentally brothers) in Diabolik Lovers, including Yuki Kaji as the Token Mini-Moe.
- The Wiki Rule: Brothers Conflict Wiki.
Trivia / Brothers Conflict