The year is 2017... You, a genius physicist and Kamen Rider Build, are destined to save Gensokyo? (I'll be making other Kamen Rider versions eventually too! ☆)
The Stage 1 boss of Touhou Seirensen (also the Stage 5 mid-boss). Ability: Finding sought-after objects. Type: Confinement & Monopolization. She keeps her target within her surveillance range to slowly and thoroughly monopolize them all to herself.
The Stage 2 boss of Touhou Seirensen (also the Extra mid-boss). Ability: Surprising humans. Type: Dependency. She will do absolutely anything just to make someone depend on her.
The Stage 3 boss of Touhou Seirensen. Ability: Using nyoudou and phantoms as familiars. Type: Harmless. Her yandere tendencies don't trigger when talking to her friends from the Palanquin Ship, but she snaps if you speak to anyone she doesn't currently know.
The Stage 4 boss of Touhou Seirensen. Ability: Causing shipwrecks. Type: Monopolization, Dependency, & Needy. She monopolizes everything within her reach and uses suggestion to foster dependency. She is incredibly weak to being pampered; if you act sweet toward her, she will listen to almost anything you say.
The Stage 5 boss of Touhou Seirensen. Ability: Attracting treasures. Type: Berserk & Needy. If her 'treasure' tries to escape, she will chase them down with everything she has. She is extremely weak to being pampered and will follow almost any order while being doted on.
The Stage 6 boss of Touhou Seirensen. Ability: Using magic (specifically physical enhancement magic). Type: Resistance. She is still a sane, virtuous person... but occasionally her inner resistance fails, and she loses control of her obsessive impulses.
The Extra boss of Touhou Seirensen. Ability: Making objects unidentifiable. Type: Dependency, Monopolization, & Needy. She tries to make you dependent on her before monopolizing you. She is very weak to being pampered and will do whatever you ask when she's being doted on.
The Stage 2 boss of Touhou Shinreibyou. Ability: Reflecting sound. Type: Dependency, Monopolization, & Needy. She aims to create dependency before monopolizing her target. She is extremely susceptible to being pampered and will obey any command when she is being doted on.
The Stage 6 boss of Touhou Kishinjou. Ability: Using the Miracle Mallet. Type: Dependency, Monopolization, & Needy. She prefers to establish dependency before monopolizing you. She is incredibly weak to being pampered and will listen to anything you say when you act sweet to her.
The Extra boss of Touhou Kishinjou. Ability: Making anything follow a rhythm. Type: Dependency, Monopolization, Needy, & Resistance. Usually, she acts normal, but at times she seeks to create dependency and monopolize you. She is helpless against being pampered and will do anything you say when doted on.
Yakumakura, a genius physicist, has just been reincarnated along with his entire house into Gensokyo on November 30, 2017.
Being well-versed in physics, he understands the mechanics of the teleportation.
Alright... time to take the belt and bottles with me!
He is Kamen Rider Build, a hero from 2017 destined to save the world.
Release Date 2026.08.20 / Last Updated 2026.08.20


