In episode 50, Anna has to return back to her own time with Pochitan so she tearfully says goodbye as she flies up into the sky to Mikuru and the others, who are also crying. Anna tells everyone to meet on the day of her birthday. The last scene shows Anna in her bedroom, where Anna's mom is calling her to wake up. Anna seems to have forgotten everything that happened in the past.
Episode 51 starts with Anna's mom asking if Anna is planning to sleep the whole day. Anna says that she feels like she was in a dream but she can't remember. Anna's dad returns home. They celebrate her birthday and Anna asks for her birthday present, which Anna's mom tells her it's a secret (Arcana, get it? Hahaha) and to find out what the secret is, she has to solve a mystery. Anna's mom gives her a hint. As Anna investigates, she comes across a blue butterfly. It feels nostalgic to her yet she can't figure out when she saw it.
Anna gets stuck at one point but she eventually figures it out when she thought back to her mother's words. It leads her to... a detective agency? She enters and finds a Jewel Cure Watch (that's her birthday present) and a stuffed doll, which turns out to be Pochitan and she springs back to life. Anna freaks out as the doll is speaking and flying but then we hear a confetti popper and voices congratulating Anna for solving her "first" case. We see Anna's parents, older Kurea, older Luluka, Jett (who still looks the same) and the fairies.
Anna is confused then we see Anna's mom giving her something which awakens the lost memories that Anna buried deep in her heart. Anna calls out everyone's names, and then turns to her mom, calling her Mikuru. Mikuru says, "You finally remember everything. Welcome back, Anna." Anna cries and hugs her mom. That's a wrap for the season, guys.