The Final Boss Who Triggers Massacres, I’ll Make You Happy as a Supporting Character!

“The Last Boss Who Causes a Great Massacre— In the world I was reincarnated into, my favorite character’s life held tragedies that were never depicted in the game? This is the love story of a supporting noble lady who cherishes and protects her favorite character and a once-lonely former final boss who gradually opens his heart to her actions..”

The Final Boss Who Triggers Massacres, I’ll Make You Happy as a Supporting Character!, Dai Gyakusatsu wo Hikiokosu Last Boss, Wakiyaku no Watashi ga Shiawase ni Shimasu!, The Last Boss Who Causes a Great Massacre,大虐殺を引き起こすラスボス、脇役の私が幸せにします!,大虐殺を引き起こすラスボス、脇役の私が幸せにします！