Watch full Sengoku Collection Episode 15 English Subbed online for free in HD. Full HD Sengoku Collection Episode 15 English sub streaming online. Annihilate Princess. Mogami Yoshiaki is a little edgy when she has to spend two nights with her friends at a haunted mansion as she is afraid of ghosts. Things start to get weird when her friends start disappearing one by one during the night. Whilst attempting to find the supposed ghost responsible, Yoshiaki instead finds Masamune, who had been hiding out in the mansion. Yoshiaki offers to help Masamune but she declines, saying it is best to stay away from her so she doesn’t get involved in her crimes. After Masamune leaves, Yoshiaki returns to find her friends are safe and sound.