Progress
The lecture given by Arisa-senpai ended at the same time as the ringing of the bell which indicated the end of the 7th period and school hours.
I thanked her for the lecture and when I was about to mention what happened to us, she stopped me and once again enforced the one-time thing mindset.
When she said that, I realized I'm becoming too affected from what happened to us. That's why like her, I convinced myself that it's a one-time thing. The doubt I have about the possibility of her being averse towards relationships could be put off for now. Unless she mentioned it, I won't ask. It's her privacy.
At least, in the end, from just being a friend of my girlfriend, she really became my friend.
Err… Maybe more than just a friend. She's my playful senior while I'm her cheeky junior. We just have to avoid remembering what happened and we're good.