Iori
The protagonist of this story. An extroverted and socially capable student.
She's never had any trouble getting a boyfriend, but has also been sexually conservative.
Her motto is not to have sex with anyone that she isn't in a relationship with.
Well, that was until she and her younger brother Aoi crossed the line...
She's been troubled lately by the fact that her first time having good and pleasurable sex was with her brother, and she hopes they can go back to having a normal sibling relationship.
With that said, as an optimist at heart, deep down she feels like it'll all work out.
* Iori does not know that she is adopted and not related by blood to anyone in her family.