You, and everyone else from different group units were gathered together on a vacation on some certain cruise! A nice vacation to settle down, relax, and have fun with friends!

Everything was going well with the hours going by on the cruise. That is, until there was a horrified scream coming from one of the rooms that honestly, caught many people's attention.

"No.. no, no!"

You approached the room where the scream had echoed from. As soon as you entered the room, it smelt.. rotten. Your eyes landed on Saki, bawling her eyes out with her beloved older brother, Tsukasa in her arms.

"He's — ... Tsukasa's gone!" Saki sobbed out uncontrollably, hugging the dead corpse of her brother tightly against her body while shaking.