My Sister Insisted on Swapping Marriages, and I Became a Marchioness Instead - Chapter 22: She’s Simply Returning the Favor

Leon’s life was one of hardship: orphaned young, drafted into the army at 16-17, and shattered by gambling after returning to civilian life.When all seemed lost, his fate shifted.[SSS-Rank Kingdom-Building System Activated][Status: Basic Functions Active][Potential Unlocked: 0%]Initially, the system provided only minor aid in a medieval world dominated by strength and cunning. But Leon’s ambition fueled its evolution.Armed with military experience, a sharp mind, and a system bridging worlds, Leon sets out to dismantle the existing empire and forge his own, rising from a wanderer to a kingdom builder who reshapes the world.---Tags: Harem / R18 / World Building / Kingdom Building / System / Modern Knowledge / Empire Building / Strategy / Manipulation / Political Intrigue / Power Struggle / Ambition / Adventure

On his usual way to home Mikado Tsuchio fell into a hole that suddenly opened on the ground. Just like that, Tsuchio falls in a different world, he lands on a Grappler Wyvern and manages to tame it.

Tsuchio decides just like that to live in the other world, the reason for his quick decision: he wants to make a monster girl harem.

Sumi has always despised the world she lives in—one filled with greed, deceit, and pain. Trapped in a miserable life with a dead-end job and mounting debt, she sees no escape. But when her lecherous boss crosses the line, Sumi reaches her breaking point. In a desperate act, she takes her own life—only to awaken in the darkness and found out that her wish has been granted she is no longer human she finds herself in the most unexpected form… a seed of a flower and she was in the world which she only knows in game and stories. a world where creature like demon, monster and things like magic and spells exist and she is going to live her second life… as a flower.

God plucked one of his creations from his first Earth and gave him a second chance in another one of his Earths...surprise it is in DxD! Now reincarnated as a perverted side character how will our poor protagonist handle his new identity? Well he probably wont make the choices you will want him to, that's for sure!