DxD: Rise of The Leviathan

Although his bloodline is impure and includes a succubus mix, he has Agumon that’s been with him since childhood... He is unexpectedly named the heir of the Leviathan bloodline and even has a beautiful fiancée. However, as everyone knows, having a powerful fiancée usually means... a breakup is on the horizon. When Sona comes to break off the engagement, Lelouch awakens the Villain Sign-In System, completing villain tasks to receive system rewards. [Ding! Host intercepted the Red Dragon Emperor ahead of time. reward: Perfect Fusion with Boosted Gear!] [Ding! Host cucked Irisviel and Aoi Tohsaka. reward: Authority of the Minotaur!] [Ding! Host conquered three devil princesses: Seekvaira, Rias, and Sona. reward: True Devil King Bloodline!] [Ding! Host aquired the Underworld Queen Grayfia. reward: One-time Time Travel opportunity!] (Main world is High School DxD, but the mc will be summoned into worlds like Fate/Zero, Strike the Blood, Frieren, DanMachi, and Problem Children, etc.) ------ I am only translating this work and is not the original author. The original book is in Chinese and titled (综漫：反派恶魔，开局签到赤龙帝), written by Lord Rama. All credit for this book goes to the author. This translation is done out of appreciation for the work and to share it here.