I really don't want to have a girlfriend.

"Hello, have you ever been in a romantic relationship?"
"Of course not." Tenkuji Yu shook his head. "I've never had a girlfriend. If you don't believe me, ask my system. I'll admit defeat if anyone has any memories of being my girlfriend."
"Then who are they...?"
Tenkuji Yu turned his head and saw Yukino Yukinoshita, Asuna Yuuki, Masuzu Natsukawa, Yukino Yukinoshita, and Utaha Kasumigaoka walking over, all with expressions that said they wanted to settle scores with him.
"Little Youyou, I've remembered that you left me at the hotel without my permission."
"Yu-kun, I've said it before—I won't forget, I'll definitely remember you, and I'll never forgive you!"
"Ayu, lovers can be hit by three pages of Euler... Are you ready?"
"Tenkuji-kun, until I propose breaking up, we will still be boyfriend and girlfriend."
"The female lead has amnesia, the male lead leaves... I don't like this kind of clichéd, stomach-churning plot, Yoyo-kun."
"...Something's not right with you."
Tenkuji Yu appears calm on the surface, but is inwardly panicked and preparing to escape.
"System, you damn well better come out here and explain yourself!"
"Meow."
(The description is subject to change; please refer to the content for the most accurate information.)
(Keywords: harem, You thought he was your boyfriend? No, I was here first!)