The events of Weeping Willows starts with 19 Ultimates trapped in a mansion by a ghost named Spectre. Something unnatural happened in this mansion, and the Ultimates have to figure out what happened. In addition to this, they are forced to participate in a mutual killing game and find the mastermind behind this all.
Weeping Willows Despair contains examples of:
- Action Survivor: Eight students survived the events of the Killing Game.
- Alone Among the Couples: Budmimir Dragmire and Hachiro Inoue do not end up in a relationship at the end of the Killing Game. Justified given that they are younger characters in the group.
- Crapsack World: The theme behind this Mansion. Anything that can go wrong has gone wrong.
- Transgender: Genko is agender and goes by he/him, she/her, and they/them pronouns.