ダブルフェイスにくちづけ

Alex Lowe, a young but ruthless mafia boss falls in love at first sight with Shirai Kanata, a quiet student. However, Kanata is actually the skilled assassin known as "Black Swan" and his next target is Alex! Unlike his previous targets, Alex gives him genuine and sincere love and Kanata's heart is in turmoil... (Source: Julian Publishing)