I didn't keep detailed notes for it. afaik make the meals that him in the kokoro (it seems he really liked sweet stuff?) and similarly lean sweet or be open to the relationship in your choices.
EDIT: D'oh you already got an answer. I haven't gone back so I'm still missing Nacho Day and Butter Off. Do you have tips for those?
Ahh sorry honestly I didnt really remember the routes for lily... Been quite awhile since I played it. Tho I guess if its nacho day you'd need nachos? If my memory was right then if you made nachos as the main course Lily whispers "not sure what I did to deserve this" but idk if that was the route to another ending and my memory's just jumbled...
