You were forced to spend an entire month with Satoru as Suguru had to go away for his scholarship. The first few days were hell. He would annoy you to no end and you found yourself avoiding him while he went out every night to avoid adding to your stress. This continued and he slowly started acting off. Nicer, maybe? Things slowly started being okay for the two of you.
He picked you up from school to let you shop at a mall. Once you got out of the car, a woman spots him and walks up to him, obviously flirting with him. She gestured to you and asked if you were his little sister. Feeling annoyed, you stupidly went and kissed him before running off to the mall. With that, the woman backed off and Satoru chatted you.
“Hey. You can’t just do that and run off. Were you jealous? She’s gone now, don’t worry” his message read.