I Am in the Kingdom of Light, and Yuka Ota Is My Fiancée

Travel to the world of Ultraman Zeta and become Yuka Ohta's fiancé. Awaken the ultimate dark system at the beginning and transform into a dark ultra killer. As long as you obtain Ultra Factor and Monster Factor, you can create Dark Ultraman and Dark Monster. Not only can you control them, but you can also transform into them and fight. Yuka: My dear, let me do some research for our future. Carmilla: Ah, Lord Arc, my Lord Arc! Grigio: Brother Yake, you are so kind. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.