Aki is acting that he doesn't know. But depending on your choice on Day 21:
If you lied to Saya, next day he'll just confront Yuu about dating Shoichi.
If you told Saya the truth, he wont confront Yuu about dating Sho.
The issue is that there are inconsistencies later on regarding if he did confront You or not. Most of the issues were fixed, but there are a few remained. Mostly caused by the scene in the morning of Day 31 (Route A) or 30 (Route B), when Aki confronts Yuu and Sho about dating, before the boys went on a date in the park.
In case you lied to Saya and the next day Aki confronted you about dating Shoichi, the scene is odd, considering Yuu and Sho know about Aki knowing about them.
In case you told Saya the truth, it doesn't look weird, but later on the boys act like Aki didn't confront them already.
Okay, so the MC didn’t lie to Saya, but Aki still confronted the MC or just had his suspicions. So, is it a bug or am I on the bad route somehow? Because everything seems normal so far. I got Shoichi to get in contact with his mom and then asked Saya for advice on the college gig instead of romance advice, but I didn’t get the scene at the end where Shoichi ends up forcing himself on the MC—just the kissing—and then, mostly at the end, they talked it all out at school and they’re still good, then the part where he almost quit the team, and then the terrible cliffhanger made my heart stand still.
Took me while but i see what you mean 😅