Elf Dorei to Kizuku Dungeon Harem: Isekai de Netotte Nakama wo Fuyashimasu

Mars, a young man who was reborn in another world, is traveling with his elf slave, Lilia. His goal is to conquer the world's seven greatest dungeons and obtain the "Tome of Forbidden Magic," which contains powers beyond comprehension. However, he tends to fall behind in his questing because he is busy making love to Lilia...... all day every day...