Story
The Strongest Demon vs. Monster Hunt! A Secret School Romantic Comedy! “In a few years, the Minamoto family will be driven to ruin by a single demon.” In response to this prophecy, Yoriaki Minamoto ventures into the Demon Realm to defeat the “Demon of the Crimson Sky.” In the Demon Realm, strength is everything, and the strong dictate the rules of the world. While hiding his true power and identity, Yoriaki searches for the Strongest Demon but what he encounters there is…
Synopsis via AniList (English).
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Picked from our own catalogue — same author, or the genres overlap.