The Peerless Mature Hitman Wants to Live Quietly With His Daughters

Harland Defense is an old man.
He holds the world’s only Risk Rarity Level 8 rating,and even that doesn't fully express the overwhelming power of this one-of-a-kind hitman.
He takes on missions from governments and the most influential people in the world,receiving weapons from a girl known as “Mourning Dress” and executing each job precisely and perfectly.
“I want to create a world without crime.”
The greatest hitman had only one small weakness.
That weakness was the peaceful, troubled girls with a story behind them who lived in the apartment building where Harland worked as the apartment Manager.
A thrilling yet heartfelt story unfolds in the hitman’s life, filled with both secret missions and charming everyday moments with girls who have stories of their own.