Instructions
Give Celia gifts. Celia likes cake, curry, diamond and pink diamond, yarn and perfume. Make sure to gift her on her birthday, which is 6 spring.
Talk to Celia every day.
Cast the Harvest Goddess's spell on Celia. Rescue 60 sprites to restore the goddess, then bring her a gift every day for 10 days. The gifts must be something she enjoys, like strawberries or pineapple. On the eleventh day, she will reward you by casting a spell to raise the AP of the girl you like by 2000 points. Choose Celia.
Attend festivals and talk to Celia. Going to the Fireworks Festival, which takes place on 24 summer, is a good way to spend time with Celia and earn AP. If Celia's heart level is green or higher, she will ask you to watch the fireworks with her. On Spring Thanksgiving, which happens on 14 Spring, give Celia cookies to earn 1,000 AP. On Winter thanksgiving, if Celia's heart is purple level or higher, Celia will visit from 8 AM to 9 AM.
Participate in Celia's heart events. The first event has no heart or AP requirement. It takes place traveling to Vesta's farmhouse any rainy day except Monday, between 10 AM to 5:50 PM. For the second, raise her heart to purple heart, which is 10,000 AP. The event takes place any day but Monday walking from main path to goddess pond between 3:30 PM and 5:50 PM. The third heart event is available when Celia's heart is at blue level, which is 20,000 AP, and occurs on any rainy day at Dr. Hardy's clinic, 6 AM to 12 PM. For the fourth, Celia's heart must be at yellow, 40,000 AP. This event takes place any day but Tuesday or Wednesday from 4PM to 5:50 PM. In the events, Celia will ask you questions, and you must answer them correctly. Make sure to save before the event, in case you answer wrong and need to start over.
Purchase the big bed and the blue feather. The big bed is offered after you upgrade your house twice.You can buy the feather from Karen's Supermarket. Equip the feather as a tool and flourish it when Celia is around. This is your proposal. If her AP is higher than 60,000, she will say yes.