cckerberos I've been lazy collating and verifying these, I'm sorry. Most of these are just clarifying some "Your choice will affect future events" since we have hard examples of what to pick now with missing events.
I'll also leave a line that can be copy and pasted, trying to copy your style from the rest of the mod, though I have no idea if it'll be helpful.
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Chapter 2's Main event "Forty Degrees Below Zero ( day264 ): Hint can't be clicked on, so people can't figure out you need to lie to Karin otherwise you will miss events. I don't know if the guide mod has a useful hint in it or not thanks to this.
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Chapter 2's Chika event "The Gap in the Door" ( chikadate45 ): It doesn't have a hint. It should have one. You miss out on Tsukasa's Ch4 events by not thinking it's normal even if you do Holden Caulfield correctly.
Choosing "Go in. This is normal." is a requirement for future events.
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Chapter 3's Chika event "Our Time Atop This Mattress" ( chikadorm45 ): Just gives vague advice. We know you miss on at least 2 Ayane events if you pick anyone else, and all the other choices have been referenced with small bits of dialogue.
Choosing Ayane is a requirement for future events.
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Chapter 3's Makoto event "White Oak Doors" ( makotolust30 ): It's technically correct, but can be improved. Once you complete Beyond the Reach of God, the game will autoplay events until Makoto's dad dies and you're locked out of grinding more lust for her. This is the point of no return that you should finish grinding before.
You have until the Nodoka event Beyond the Reach of God to complete the lust requirement.
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Chapter 3's Futaba event "Toys" ( makotofutabafuntimelustevent ): It doesn't appear in the hint screen early enough for people to do anything about Makoto's unlisted lust requirement of 49. Making it appear at the start of chapter 3 would work, you could also point use the same point of no return for Makoto's lust grinding as I suggested for White Oak Doors
You have until the Nodoka event Beyond the Reach of God to complete Makoto's lust requirement of 49.
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Chapter 4's Otoha event "Taint the Sapling" ( otohaspring2 ): Technically there isn't a missed event, but you do miss Otoha's phone number, her 1st Photo, a large section of "Sex Dreams" (Where Rin finds out about the photo), a large section of "Sod in the Seedbed" (Where Rin confronts Otoha on the beach and it was recently referenced with Rin being super horny before calling Sensei and trying to seduce him with video. Unless Sel decides to ruin Niki's life with Otoha spreading around her nudes, we're not likely gonna get a full event missed, but there's plenty of worthy content missed out by not doing the trade, and only some little "You’re lucky I’m a good person." dialogue. I think it's fair to say it should be traded at this point.
Not sending the photo will lead to missing large amounts of content.
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Chapter 4's Tsukasa event "Failsafe" ( tsukasaspring3 ): It doesn't have a hint. It should have one. You will miss a Tsukasa event if you don't Take It (The Talk) alongside the rest of her very telegraphed arc.
Choosing "Take It" is a requirement for future events.
I couldn't find the original posts with the guide mod complaints but I was able to crowdsource most of these, and I verified everything that I could. Unless my install is bugged with the Karin hint I think everything else is correct.
