Kaiju No Hanauta｜怪獣の花唄

"If you wonder alone out of this hill, you'll automatically be transported back here."
"Oh? I've never seen you so keen on using your ability."
"I only reserve those for VIPs."
"There are other VIP around other than me?"
"The earth doesn't spin just for you, Makima."
"And Chainsaw won't get a normal life just because I'm stuck on a hill."
"You're still eager to get your hands on that dog?"
"I had him."
"That's right. Had. It's in the past, let it go."
"Says the one who punches me for disappearing on her ten decades ago."

A contract bounded relationship forces Reader to deal with her ex - who appear before her in just the shape of a heart.
Perhaps time could heal the wounds of the past and fix a person's mind. Even a Control Devil.