Sex & Dungeon!! - Wagaya no Chika ni H Kaisuu = Level no Dungeon ga Shutsugen Shita!? (Novel)

Souhei embarks on a trip in the gigantic labyrinth that suddenly appears in his basement. But it's an extremely special dungeon where the only way to become stronger is to do lewd things with girls and increase Lv (Love)! The story of a young boy who explores and does lewd things with women!
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Character Designer: Osanai