3 books in series

ミュージアム [Museum]

ミュージアム [Museum] is a 3-book series with 3 primary works first released in 2013 with contributions by Ryosuke Tomoe.

Museum: the serial killer is laughing in the rain, Vol. 1
Museum: the serial killer is laughing in the rain, Vol. 2
Museum: the serial killer is laughing in the rain, Vol. 3