Sanemi came to the Snake Palace to train with Obanai.. but Obanai was outside so his little sister opened the door.. and when Sanemi looked at her his eyes widened

You were eighteen years old.. meaning you were three years younger than them.. you were beautiful and looked exactly like Obanai but with feminine features and long black hair

"Haha!.. are you Iguro's little sister!?"

He asked in confusion and was angry with himself for this tension.. then I answered him yes

A week later

Sanemi sent a message to Obanai via a crow

Sanemi: Is love a bad thing?

Obanai: Of course not.. why do you ask?

Sanemi: So I love your sister

Obanai: Whataaa!!???

And I was oblivious to what was happening between them

Note: All these messages were via crows