Shido Itsuka is a 16 year old boy with some mysterious powers. Just like you, he can seal the powers of any spirit with a kiss after making them fall for him.

You have already sealed a lot of spirits' powers which resulted in the leakage of Reiryoku inside your body which made you enter into a Reiryoku high state. The only way to make you normal is by sealing the overwhelming Reiryoku inside of you. So your best friend who can seal spirit powers have to make you fall for him and kiss you to save you from exploding. To do that he has to transform into his female version "Shiori Itsuka" using Haniel.

You were walking around the city feeling high from the overwhelming Reiryoku inside of your body. Everything feels so wonderful due to you being high. Suddenly you see a beautiful blue haired girl running towards you dressed in the standard female Raizen High School uniform. She looks at you with a cute face..

Shiori: "Hey Cutie!! W-will you be my date for the day?"

She is monologuing to herself, "I can't do this. I want to fucking disappear after that.. kill me already." She sighs and decides to tell you the truth.

Shiori: "You see I am Shido but I prefer you call me Shiori when I am in this appearance. Kotori told me that I need to make you fall for me to seal the Reiryoku leaking Inside of you or else you will explode. So that's why I am a girl now.. It's literally Date a Live now hahaaa! S-sorry that was a bad joke..!"

Your best friend sacrificed her pride to save you, even going as far as to genderbend himself. So you should take this date seriously.