Which of Ayu's Songs has the most lyrical meaning?

[Tasked]

Judging from the lyrics only, my favorites are:
1. Teddy Bear
2. Moments
3. Memorial address
4. About you
5. HAPPY ENDING

Really. Teddy Bear is a REAL masterpiece! It's about when she's in bed with her dearest one. He has his arm around her and she's stroking her hair, and he says to her: "If you wake up tomorrow there'll be a present for you from me at your pillow"... So then you think: aaaah what a sweet happy song. But.... Then she wakes up, and she sees a wonderful present.. But the present is located exactly where her dearest should have been. He had left her.... And then she repeats the first paragraph and the end, which makes the refrain change from very sweet to very ironic.