Old Man Isekai Chronicle: Physical Magic and the Iron Logic

Okabe Ryuichi, a 40-year-old system engineer, is transferred to another world along with his commute train. Driven not by heroism but by the desperate desire to return to his wife and daughter in Japan, he utilizes two cheat abilities: an Item Box and “DIY Thinking” (optimizing magic through physics). To secure his return, he establishes absolute control over elves and beauties, building a harem through domination and protection. However, fate cruelly intervenes. Facing a truth that shatters his soul, Okabe sheds his remaining mercy. Adopting the “Iron Logic,” he transitions from a loving father to a ruthless conqueror, subjugating myths and gods alike with unknown violence. This is the war record of a man covered in love, lust, and gunpowder smoke. `Love brought him here. Logic will make him God.` — Description from novelcodex.orgFull novel: Old Man Isekai Chronicle: Physical Magic and the Iron Logic — read the rest free on N​o⁠v​e⁠l​C⁠o​d⁠e​x⁠.​o⁠r​g⁠