Light Novel Out-of-World Magic Is Behind! (8) Overlap library

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The strongest modern magician vs. the top of the different world swordsmen!
The modern magician Suimei Hakki, who defeated the magical army that invaded the empire. After facing the enemy of fate, he finally confessed to his best friend Rina Liji that he was a modern Japanese magician. The person who parted with Liji who was surprised once and was waiting for Suimei who returned to the imperial capital was -- pool in swimsuit? Suimei enjoyed a brief rest, but got a hint on how to return to the original world from the casual scene?
The different world fantasy that mixes the different world magic and the modern magic, the beginning of volume 8!