[ finally... some strong people to lift the things for dazai that he doesn't want to lift on his own. ]

Sakyou played Oregon Trail with us, too. I'm sure that he'd want to see Kei.

[ after all, sakyou's name was the first (or second?) that kei had inputted into the oregon trail game... surely, that means that they know each other. ]

Then, one of us should look for Sakyou. The rest of us can stay here, making sure that nothing suspicious happens to Kei's body.