The Ramparts of Ice (Japanese: 氷の城壁, RR: Koori no Jouheki) is a critically acclaimed "slice of life" romance webtoon and manga by Agasawa Kocha. It has gained a significant following for its incredibly realistic and sensitive portrayal of teenage social anxiety, the difficulty of communication, and the "walls" people build to protect themselves from being hurt.

The story centers on Koyuki Himuro, a high school girl who is often perceived as cold, distant, and unapproachable—earning her the reputation of having a "rampart of ice" around her heart. In reality, Koyuki is simply socially awkward and struggles to express herself. Her life begins to change when she meets the cheerful and persistent Minato Shito, the observant Eita, and the outgoing Miki. Together, these four characters navigate the complexities of friendship, past trauma, and the slow melting of the barriers they’ve built.

Alternative Names and Titles

氷の城壁 / Koori no Jouheki / Walls of Ice / The Ice Wall