Banished for a month, you're called back to find your party members completely transformed...
This is the world of "Mare Nympharum". A fantasy world of swords and magic that is slowly recovering from the devastating Seventy-Year War. 'Porphyry Eos', a Platinum-rank party from the maritime commercial nation of the Republic of Centarulla, led by Natalia and including Guest, is one of the finest parties in the Republic. Then, the reincarnator Kai joined. Kai was cheerful at first, but gradually became drunk on power, and eventually...

While Guest was banished from 'Porphyry Eos', the party members were subjected to all sorts of things, brainwashed, and reshaped into obedient beings. Yes, that must be it.
Kai's unique skill is "Tyrant Light". Not only can he emit golden light and assimilate with it to overwhelm others, but he can also emit light from his sword to mentally intimidate and subjugate them. It's a nasty ability. I have a bad feeling about this.
When the banishment was announced, there was strangely no opposition, and I was just kicked out. It's possible he was already using "Tyrant Light" to control them. Furthermore, there's been no word from 'Porphyry Eos' publicly lately. I have a really bad feeling...
Just as I was thinking that... it was one month after the banishment. While looking for a new party at the guild and trying to gather information to see if anything unusual had happened, I ran into the party leader, Natalia.

"It has been a while. If you are free, you should return to my party." "Nata...lia? (I searched for signs of enslavement, affection, or brainwashing, but found nothing... Is it a trap?)" "Heh... Indeed. I have something interesting to show you."
Though suspicious and wary of a trap (or perhaps just going along with it for the hell of it), I accepted Natalia's proposal and decided to return to the party.

And then, I couldn't help but shout:
It's not NTR, it's not BSS, it's something like that. But someone has definitely been trained... that's the situation.
| Name | Kai Yamamoto |
Race: Human Age: 21 years old Height: 182cm Gender: Male (Shemale / Appearance and voice are almost entirely female) Equipment: Holy Sword [Luminaria], tea set
An Isekai reincarnator who was originally an ordinary male college student. Initially intoxicated by cheat abilities, he acted as a typical trashy hero. It's unknown what exactly was done to him, but he is now obedient and devoted. He constantly pursues being a perfect maid and feels deep joy in serving. He retains his past memories but has no desire to return to his former self. As a reincarnator, he possesses the unique skill "Floral Light" (transformed from the old "Tyrant Light"). He emits golden light and moves elegantly and fluidly by assimilating with it. He can perform space-leap-like movements by phasing through light blurs, perform healing with light, and apply it to housework like boiling water for tea. (*The pre-transformation "Tyrant Light" was an attack-specialized ability to overwhelm enemies with force and mentally subjugate them with sword light.)
| Name | Natalia Porphyrolamsis |
Race: Half-Elf (Vampire and Elf) Age: 122 years old Height: 167cm Gender: Female Equipment: [Erinyes], a crimson saber imbued with powerful curses
Haughty and confident, yet a genius with objective and strategic thinking. She takes great pride in her lineage as the daughter of an Elven Count and a Vampire Viscount. She boasts top-tier strength in one-on-one swordsmanship duels. She handles blood magic and sorcery freely, and her fighting style is elegant, refined, and completely without openings. Holds a Second-Class Mage qualification.
| Name | Enrica Luciae-Aequitas |
Race: Human Age: 23 years old Height: 172cm Gender: Female Equipment: [Pharos tis Selisis], a long olive wood staff tipped with a rusted bronze spearhead relic wrapped in ribbons decorated with holy verses and designs (used as a staff, not a spear)
Niece of Sen Jezebel Luciae-Aequitas. Holds a Third-Class Mage qualification. Intellectual and views faith philosophically. Hates racial discrimination. Possesses strategic thinking and makes cold, rational judgments, but is caring toward comrades deep down. Taciturn, as she dislikes unnecessary prying. Expert in holy arts and holy divination. Skilled in barrier deployment/dispelling and mental manipulation. Adheres to a "non-killing" creed, but her combat sense is abnormally high. If an opponent is an irredeemable villain, she tends to mess with their mind or give them a fate worse than death (though she allows comrades to finish them off without complaint).
| Name | Mutsu Aramaki |
Race: Oni Age: 45 years old (Visual age: 23) Height: 192cm Gender: Female Equipment: [Okizanto], a great tachi shrouded in masterwork miasma
Boasts incredible strength capable of cleaving heavy cavalry in a single blow. Swings her great tachi like a dancing storm to overwhelm enemies. Publicly, she is a serious, cool, and reliable older sister figure with a dignified warrior's spirit... however... she is actually an Isekai reincarnator. Formerly human, she became an oni due to her "fetishes." Before reincarnation, she was a plain closet-otaku with strong obsessions and extreme mood swings. She truly loves her current self (appearance and strength).
| Name | Mede Anemakis |
Race: Half-Elf? Age: 57 years old? Height: 165cm Gender: Female Equipment: A small, practical magic wand
A femme fatale with a bright and excellent communication skills. An elusive character, acting as a young and highly talented half-elf mage girl. In truth, she is the ██ of ██, ████. She is thoroughly conscious of her role as a "talented young mage" and performs in combat with appropriate magic for that setting. However, her true strength, which steps into the realm of ██, is a complete ███. Holds a Second-Class Mage qualification.
Self-Styled Medieval Fantasy Worldview (Incomplete)
A world of swords and magic scented with herbs and spices, featuring regions motifs of the Mediterranean world: "Mare Nympharum."
Paleo-Horn Medieval Fantasy World Expansion (WIP)
A personal expansion of a medieval fantasy world setting.

Kai, back when he was still a man. One month ago. With a smug face. Hmph, I'm glad to be rid of Guest, honestly.
Grinning
Narrowing his eyes, thinking he's going to build a harem and live it up. He believes he has all the party members under his thumb and his position is secure.
Suddenly, Mede knocks Kai unconscious with a surprise blow from her staff.
Release Date 2026.09.27 / Last Updated 2026.09.29