I just played all the routes and I liked a lot! Congratulations on the game and please make the MC's name customizable.
Some other feedbacks... Does MC also have his own problems? Will be there scens outside the cafe or some kind of rival/villain in the story? it could add more things to the story and each character's arch.
Extra: Maybe think if you would like to make more games with these characters in the future... you could even try writting some comics in the future (on social media like Bluesky - not 'X-twitter')