The album "Memento" derives its name from the Latin word for "a thing to memorize". Taking inspiration from a commemorative book of memories, the album's design concept is centered around the use of different paper qualities, sizes, and objects as narrative techniques to connect the lyrics of each song. Rather than traditional box packaging, the outer layer is packaged in a blue transparent envelope.

The various objects used include instant photos, shopping receipts (with the item on the receipt corresponding to the lyrics and the price indicating when it appeared), a leaf, a sentence, and an envelope that can collect concert tickets. This approach generates interaction and resonance with the songs, making the album more layered and meaningful.

The album's melancholic blue color scheme is also intended to echo the depressing mood of the end of summer, a theme that is further emphasized by singer Terence Lam's accompanying "Summer Blue" concert. In the end, although many of us may wish for an extra day on August 32nd to prolong our summer vacation, the reality is that regrets are an inevitable part of life. By remembering and cherishing these feelings, we can learn and grow from our regrets and become the people we are today.