Harem Daily Life in High School DxD

Miyamoto Kuroha, an ordinary second-year high school student, one day finds himself confessing his love to an incredibly beautiful girl named Amano Yuuma.
Unbelievably, Kuroba and Yuuma are making rapid progress.
Before long, the progress reached the hotel.
Bathed in pink light, Yuuma's face displayed a mixture of pain and satisfaction.
"Hey, Kuroba-kun, this is my precious first experience, so can you grant me a favor in return?"
"what?"
"Could you... just die?!"
At the peak of his pleasure, a spear appeared in Kuroba's chest, piercing him from front to back.
As he lay dying, he saw a flash of blood-red light before him, and a red-haired girl appeared in front of him.
"It was you who summoned me..."
Some characters are out of character (OOC).
Characters with surnames and given names: qcqs.
P.S.: The author dislikes having people who get in the way in his harem, so some characters will be gender-swapped. For example, Kiba Yuuto will become Kiba Yuuki, and the cute Gaspar will just be cut off.
If you don't like it, please don't enter. Arigato.