A mysterious sorcerer from the other world has targeted five heroines, planting illusions in their minds to slowly corrode their hearts and relationships. The "Side: Seigi" Context:

" is a visual novel/game that blends the (other-world) genre with dark NTR (netorare) themes . It is part of a larger series that often splits narratives between different perspectives—in this case, the "Side Seigi" focusing on the protagonist Seigi. Core Narrative & Premise

The feeling of being the "good guy" but still losing.

在深入分析本作之前，有必要了解其核心题材——NTR（Netorare/寝取られ）的内涵。NTR是日语“Netorare”的缩写，直译为“被寝取”，指个人的恋人或配偶被第三者夺走的情节。在ACG领域（尤其是成人向作品）中，NTR风格以刻画恋爱关系中的背叛、夺爱与绝望感为核心。

Unlike standard isekai where the protagonist travels to a fantasy world, here the fantasy elements invade the modern, mundane world, using magical abilities or status effects to bypass conventional moral boundaries.

This specific title is often associated with visual novels or adult web fiction platforms like or niche anime series.