Dekachin nara Isekai de Haramase Ou ni Nareru! -Kyonyuu Mesu-tachi ni Nakadashi Suru Dake de Tsukusareru Harem Seikatsu! | デカチンなら異世界で孕ませ王になれる！ ～巨乳メスたちに中出しするだけで尽くされるハーレム性活！～

The protagonist, burdened by his boastful, enormous penis, spent his days in frustration.

One day, while masturbating, he was suddenly summoned to another world. Aria, an angel who appeared to greet him, explained that the protagonist was a descendant of a hero who had once saved the world, and asked him to spread his blood by making babies with women all over the world. Surprised but readily agreeing, the protagonist began by designating the prim and cool beauty angel Aria as his first baby-making partner, and subjugated her, who was reluctant, with his enormous penis, turning her into a submissive, pregnant masturbation tool!

Princess, Elf, Succubus, Samurai! Impregnate the beautiful women of another world as you please!

Thus, the ideal life he had dreamed of began.