第 6 集: 武田在菲爾的壓制與蘇伊的酸液支援下，與迷宮魔物展開激戰
Fel forces Mukouda to enter a recently appeared dungeon and fight monsters to rapidly improve his Earth magic (Stone Bullet) so Mukouda prepares by eating Japanese ingredients for the temporary status boosts. Forced to fight without Fel's assistance, Mukouda becomes more proficient at Stone Bullet, and able to fire three bullets simultaneously. He discovers Sui is useful in combat with strong Acid Bullets. After defeating an army of Kobolds, Mukouda is confronted by the dungeon boss, Kobold King, enraged by the death of his army. Mukouda desperately upgrades Stone Bullet to Stone Cannon and injures the king, but runs out of magic, so Sui kills the king instead and levels up while Mukouda passes out. Awakening, Mukouda discovers Sui can now speak in a childlike manner and refers to the outraged Fel as Uncle Fel, and while they have both leveled up, Mukouda is disappointed Sui is actually stronger than he is, but he still treats everyone to huge helpings of Oyakodon made with stat-boosting Japanese ingredients. (Source: Wikipedia)