From fragile to combative, when a girl who fights an illness becomes a heroine!Yuki is an 16-year-old girl suffering from a rare disease that puts her in difficulty in many situations but also in her relationship with others.To face the mockery of others, she withdraws into herself by rejecting any social relationship and prefers to take refuge in her imagination where she has all her abilities and make many friends.But one day a strange boy will appear and will make her discover a new side of life …