Luca was my favourite by far. Just love his easygoing manner, but gotta say I wasn't too pleased at the sort of ending bit when he gets that girl's number at the bar and the MC doesn't really get enough of a chance to call him out on that. But I really enjoyed his character development and the ending for him is admittedly very sweet.
I played through both Theo and Luca's routes, but wasn't really feeling it with Tristan. I love the lovably awkward trope but I think in Tristan's case it swung way too awkward for me, and I almost felt a little uncomfortable at points? No fault in the writing! I think his character just wasn't for me.
Favourite moment is probably listening to Luca's music and talking with him in the park. Just adore his personality and mannerisms. Might be a little obsessed at this point!
As for Mark, I think I would potentially enjoy a route like that, but only in the event that he's also rude to the MC instead of seeming to want to get into her pants. His tail-chasing comes off a little objectifying, and I'm not really feeling that vibe.
Overall, I think you guys did an amazing job, especially with the time you had. I appreciated the more mature approach to this game, exploring the themes of having to leave behind the things that make you happy in favour of pragmatism as we get older, and how we can re-examine our lives and rediscover those early loves. I like that the mc has enough self-esteem to say no to certain things or to stand up for herself. Great game :)