According to the official site, Brothers Conflict will get two OVAs. The first OVA will be Christmas themed and released in 2014. The second OVA will be Valentine’s Day themed and released in 2015.
A new opening and ending theme song will be produced for the OVAs and be done by the first opening and ending theme singers. Gero produced the series opening theme song titled “BELOVED×SURVIVAL” and ASAHINA Bros.+JULI produced the series ending theme titled “14 to 1”.
Brothers Conflict aired during the spring 2013 anime season from July 2, 2013 to September 17, 2013. It was produced and animated by Brains Base.
Brothers Conflict synopsis from Haruhichan:
Hinata Ema is the only daughter of a famous adventurer, Hinata Rintarou. One day, Ema learns that Rintarou is going to remarry with a successful apparel maker named Asahina Miwa. Since she doesn’t want to disturb them, Ema decides to move out and live with her 13 new brothers in a mansion called Sunrise Residence. As they live under the same roof, romance is starting to grow between Ema and the Asahina brothers.
Source: Brothers Conflict official site