From Aerandria Scans: 
“Those who meet the owner of the secret mansion never return to their world again…” 
There are rumours spreading around Kunuyuki's school which say that students mysteriously disappear one after another from the campus, and that there is a secret door hidden somewhere. This time the missing person is Kuniyuki’s best friend - Kashiwagi. Are the rumors really true? Kuniyuki is angry and has no idea what to do about his friend, when he meets a strange, but very pretty girl called Towa. She says she is the guardian of the “outcasts,” those who were taken to the “mansion,” but what does that really mean…?!

Những đứa trẻ cất lên khúc ca huyền bí trong màn đêm tĩnh mịch giữa ngôi làng xa xôi ẩn chứa lời nguyền cổ xưa. Cuộc phiêu lưu kỳ dị đưa những tâm hồn dũng cảm vượt qua nỗi sợ hãi để mang lại ánh sáng cho vùng đất u ám.

Yoru wo Utau Kodomotachi

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