When Su Wan fainted during military training, she bumped into "Iceberg" Lu Zhi who was delivering glucose; in the library, she knocked over the bookshelves and formed a team in the elective class. A girl who restored ancient books and a computer guru became connected over a collection of poems. The stray cat "briquettes" made promises, the post-it notes for sharing seats, the patched shoes for sports games, and the fireworks advertisement for New Year's Eve, turned the green heart into sweetness. From competing side by side to proposing after graduation, they filled up their daily life on campus with small notebooks. It turns out that the best youth is walking with you from the library to the old place.
