awwwwww this is so cute anon :3 (since it doesn’t have direct nsfw I’d be happy to do anything kind of like this for future reference!) - Admin Emma
Raichi would immediately think that he did something wrong, and that he hurt his s/o in some way, and may become depressed a bit about it. He would try and talk to his s/o about why they were upset, but seeing as they blushed every time they saw him, he would begin to believe they didn’t like him anymore. He would ask Sanada to help him to figure out why they were avoiding him and once he figured out that they were embarrassed because it was both of their first times he would laugh and try to comfort his s/o about it. Both of them being a bit awkward they wouldn’t know how to react at first, but once they settled their differences about their first time, they were closer than ever.
Yuki would be confused on why his s/o was avoiding him. He personally thought everything was great, and that the two of them were closer than ever, but when his s/o began to avoid him, he would feel a bit self conscious about himself and that he could not please his s/o. He would confront his s/o about it in a kind way and see if anything was wrong between the two of them.Once he knew his s/o was just embarrassed about their first time, he would pull them into a tight hug and comfort them saying that he was a bit nervous too, and that they had no reason to feel uncomfortable around him, bringing the two into a deeper relationship with one another.
Miyuki wouldn’t be completely aware at first that his s/o was acting strange around him, he would try and continue on with everything as normal, but once he noticed his s/o would avoid eye contact and would blush and run off he would immediately suspect that he did something wrong and that he hurt them in some way. He would confront them about it one day after practice and he would question why they felt uncomfortable around him and he would begin to think he did something wrong. His s/o would shake their head and tell him what was going on and he would chuckle a bit and tease them saying that there was nothing to worry about, that he was right there with them, that they had no reason to stay this way.
Sanada would suspect that something was going on with his s/o when he would notice that they never hung around him as much and that they would easily get flustered whenever he would try and talk to him. He would send them a few messages wondering why they would be avoiding him, the thought never crossed his mind thinking that they were shy about their first time, once he met up with them he would ask if anything was happening between the two of them and if something was wrong. Once his s/o told him, he would pull them into a hug and smile while chuckling a bit, teasing them that they were cute because they were flustered.
I hope this was what you were looking for anon! I hope this fulfilled your request! This was so cute!