No, this game hasn’t really time sensitive quests that are easy to fail, they all start when you decide to begin the quest, for example the first one gives you 7 days and starts after some days of sleeping in a certain home and can be resolved in numerous ways; so will be the later ones, always giving you enough days and preparation to complete it (Also The questlog takes record of the timer).
While scenes are a bit trickier most of them are easy to get, but some like Emily’s house harem will need the use of the walkthrough since the game doesn’t tell you that starting with Mira first can ruin the harem, other than that there are some other ones that are bit intricate (Kate’s NTR can appear tangled if you don’t progress enough with her story and corruption, Arianna goes to Rumah et cetera).
Some of these cryptic scenes (or quests) shall be reworked in a future update, if you feel too lost and don’t follow the maxim of every RPG (Visit and talk to everyone), you can check the walkthrough for the first 4 essential quests, which aren’t time limited.
And remember always have a backup save if you mess up completely a situation.
That’s all, have fun!