Transferred to another world as a magic-user, I achieved unrivaled power with my new abilities.

I mow down monsters with basic magic, heal fatal wounds with restorative power, and gallantly rescue royalty under attack.

Nevertheless, I can't seem to achieve the classic trope event of peeking during her changing, being challenged to a duel, defeating her, and turning her into a heroine!

No matter how many times I try, I can't defeat the stunningly beautiful First Princess!

However, as I stubbornly kept repeating "death loops," the deceptions of this world, which were invisible in my first playthrough, slowly started to become clear?!

No matter how many loops it takes, I will definitely save the Princess who emotionlessly killed me in my first playthrough!

This is the unknown tale of suffering of Yagami Tsukasa, who will eventually carve his name into legend as the "Absolutely Undefeatable Magic-User."

The title has been changed from "The 101st Duel ~I Won't Die Until I Build a Bond with the Princess~."

Awarded the 4th Net Novel Grand Prize. Book published by Pony Canyon BOOKS on September 17, 2016.

Volume II released on January 17, 2017.