The Chainsaw Man, but the Darkin Sword Demon

[The book is finished normally, please forgive me for the small number of words]
Traveling to the world of the chainsaw man, the mentally ill Mu Bai decides to retire in a mental hospital until the sky is dark.
Until a demon blocked him at the toilet door.
When he was desperate, the demons from another world were transported down the toilet.
"Ah, my name is Aatrox, and I am... Godslayer."
"Demon? No, no, stupid maggot, you misunderstood me, I am a darkin."
"Sinful and filthy body! I will cut it off! Cut it up! Chop it up!"
Mubai looked at the chattering Darkborn Demon Sword in front of him, and said softly:
"Sign a contract with me, from now on you will be the devil of the sword, and I will be the swordsman."
--
"Miss Pava, do you think this leaf has ever been to college?"
"Miss Macchima, may I use half of your dog to braise in soy sauce and the other half to release it?"
"Psycho? Yes, I'm a psycho."
"I have a medical certificate."
[The work "People in the League, Master of Time Management" has been completed with a million words of fine work, LOL fan, harem article. 】