Five days of "trying out" living with crush when parents are away

Rena is younger than me, our parents are also very close so we have known each other since we were young. I have liked Rena for a long time but have never told her. This time, both of our parents went on a trip together, so I had to live together and take care of Rena for the whole five days. Rena, being younger, does what she likes, her unruly mouth makes me extremely annoyed. Being at the age of puberty, living with my crush makes my sexual desire awaken. Not daring to do anything with Rena, I had to watch porn and masturbate. Unexpectedly, Rena walked in and caught me.

Although she kept saying I was a pervert, at night Rena sneaked into my bed claiming she was afraid to sleep alone. Sleeping with Rena made me unable to remain calm. My penis erected and touched her body. I thought Rena would be angry, but she actively helped soften my penis. It was only then that I realized Rena also liked me, but her "cold outside, hot inside" personality didn't show it outwardly. And so, the five days of happily living together with my crush unfolded like that...