Wow! Very interesting! How can you gain likes with Madeleine? How many likes do you have with Tao? Do you know if there are examples of talks or scenes that I have already to unlock because I don't have enough likes?
The people from your list that I didn't include I have the same amount of likes or maxed close to it on my old save I had 21 likes with Tao but on my recent one I have 20 since I was kinda speedrunning that part so I lost one like with him. And to get likes with Madeleine you need to kiss her in the mouth when she asks you for a kiss in exchange for teaching you how to cook and yes generally speaking having a higher amount of likes gives extra scenes with characters but I don't think there's any that's specific to having a high amount of likes since most scenes have a minimum amount to unlock and it's not really that high of a minimum