Kogeki Ryoku Zero Kara Hajimeru Ken Hijiri Tan Osananajimi No Ojo Ni Suterare Maho Gakuen Ni Nyugaku Shitara, Mao to Keiyaku Suru Koto Ni Natta 3 (Overlap Bunko) [Light Novel]

[Machine Translation] Eugene defeats the legendary Demon King and makes his abilities known throughout the continent. When his father hears of his success, he urges him to return home and go to the empire with his girlfriends, Sara and Sumire. But at the same time. However, at the same time, a situation occurs in which the seal of the legendary great magical beast that half-collapsed the imperial capital a hundred years ago is broken! Eugene decides to take action to defeat the legendary beast, which no one has ever been able to defeat in the past. The key to defeating the beast is to strengthen the magical link with his girlfriends, Sara and Sumire, through a certain method...? The key to defeating them is to strengthen the magical connection between Sara and Sumire, his girlfriends, through a certain method. Let's make a "physical contract" with us. The secret of Eugene's birth is revealed.

伝説の魔王を倒し、自身の実力を大陸中に知らしめたユージン。その活躍を耳にした父から帰省を促され―恋人であるサラ、スミレと共に帝国へと赴くことに。しかし、時を同じくして。百年前に帝都を半壊させた伝説の大魔獣の封印が解けてしまう事態が発生!そこでユージンは、過去を遡っても誰一人として為し得なかった大魔獣の討伐に踏み切ることを決意。その討伐の鍵となるのは―ある方法によって、恋人であるサラやスミレと魔力連結をより強化することで...?「ねえ、ユージンくん。私たちと『身体の契約』を結ぼう?」―そして、ユージンの出生の秘密が明かされる。