How did Warriors end up with idols??? (Male reader x Multiverse, Rider saga)

Otonogakisa GIRL'S High School???

It has been 2 days after I've become Kamen Rider Zi-O, but an heir of him. I kicked the thoughts of I've become Kamen Rider Zi-O Nisei 2 days ago. Besides fighting, I need to focus on my academics.

Speaking of which, I've didn't attend any school since I came back from America, that's the real problem.

"Ara ara, Ryuga, what are you wondering about?" I looked behind to look whose talking, it turns out, it's my mother.
"Nothing, just wondering where am I going to study here in Japan. " I replied with a sigh.

"What about studying in Otonogakisa? This is where Honoka studying as a first year."

"..." I didn't say a word, so I told her that let me think for about a few days since it's May right now.

Time skip: 2 days later

I've decided to study in Otonogakisa. I told my mother about it, but she told me to tell Honoka to handle it.

"Let me handle it, onii-chan!" Honoka said with confidence.

"Thanks..." I replied worriedly, then thought, (But I don't think so, Honoka...)

Half an hour later...

"Done!!!" Honoka yelled at my face with happiness for talking at the phone for that long.

"Done what?" I asked while I was playing Dragon Ball Legends.

"Onii-chan, you will be studying at my school with me." She replied with eyes are sparkling like stars.

"Oh yeah...wait, what?"

"You will be going to school with me tomorrow."

"Wha-how?" My eyes popped out, my thoughts were...

(How did she become so reliable?)

"Because Kotori-chan's mother was the director of Otonogakisa." She replied to my question.

"Who?"

"Kotori-chan, Ko-to-ri"

"Kotori...Minami Kotori? Our childhood friend?" I slightly tilted my head then Honoka nodded.

"HER MOTHER IS THE DIRECTOR OF OTONOGAKISA?!" I screamed, after that, Honoka covered my mouth.

"Yes and shhhhh..." I slightly nodded.

Then my phone rang, I looked at my phone who's calling me, it turns out, it Takami Kosuke, my second youngest cousin.

(Vegito Black: Ryuga's ringtone)

"Yo! It's been a long time, Kosuke!" I said with a cheerful tone.

"Yo, nii-san, I heard that you came back from America, is that right?" He replied with a wave, even though I can't see him...

"Yea, it's been 5 years. (*chuckles) Speaking of which, how's Chika?"

"She's great lately, do you mind if I hand my phone to her?"

"Pleased to. It's been a long time that I've talked to anyone after my departure."

"Ryuga onii-chan!!!!" Chika took the phone from Kosuke's hand and screamed so loud that I'm almost deaf.