発情期の秘密~宿敵アルファの命懸けの愛~

In a werewolf fortress, captains Rayne and Kane are chained by magic. Kane hides sister Lily as a soldier. During blood moon heat, Rayne shields Kane. When Lily is exposed, Rayne claims her as his luna. Heartbroken Kane learns Rayne took poisoned arrow for him; they confess and form a lifelong bond.