Shinwa Densetsu no Eiyuu no Isekaitan - Volume 6, Chapter 1 – Calm Before The Storm, Part 1

Yo, Hi! I’m Frank, I made a deal with a demon to pay me some money for receiving a guest for a few days every week.
I had no idea about what I have done.
On May 1st, Conan ‘the God of Death’ came to my house. I was forced to let him in and we get involved in a criminal case.
On May 8th, Bruce Wayne ‘Batman’ came to me. I was forced to follow him to fight crime.
On May 16th, Hannibal Lecter, The Silence of the Lambs, came to my home. I can only say that I really can’t stand my guests.

- Description from Novelupdates

Graduate student Yi-han finds himself reborn in another world as the youngest child of a mage family.

– I’m never attending school, ever again!

‘What do you wish to achieve in life?’

‘I wish to play around and live comforta-‘

‘You must be aware of your talent. Now go attend Einroguard!’

‘Patriarch!’

My future would be guaranteed once I graduate. For my future!

The simulation is over, and the entry is obtained: a showdown!

Looking at this entry, Zhao Meng was stunned.

“How should this term be used?”

“Hey! Here’s a wounded fox!”

…

A few years later, a woman who looked like a fairy appeared in front of him, and said:

“My lord, I’m here to repay my favor!”

This book is also called “Starting from Transforming Monsters”

- Description from novelbuddy

“Kind? What’s kind about it? Taking on such quests isn’t being kind. It’s just being a pushover. A total pushover.”As the voices faded behind him, Kai glanced back at them.Me? A pushover? No way.[You have performed a good deed for an NPC in trouble.] [+1 Benevolence.]A reward given for doing a good deed?!Calculative, yet compelling enough to continue doing good deeds whether it’s healing or dealing damage.The Healing Solaris Cleric, Kai’s, journey to conquering MID Online!