Kosuke has to seduce all 6 of the other Deadly Sins to prove to Lucifer he's up to the challenge!
Windows Gakuen Heaven 2: Double Scramble.Windows Gakuen Heaven: Boy's Love Scramble.
While a lot of the games listed here may not visual novels but they do have at least one Boy x Boy romance option Story Of Seasons: Pioneers of Olive Town.Story Of Seasons: Friends of Mineral Town.Lamento -Beyond the Void- (in progress more information here).
Lucky Dog 1 (No game patch but translations with pictures can be found online).6 Other Yaoi Games Without Translations.