Nice kitty..... good kitty..... please don't eat me!

According to the commentary, this is a parody of “a certain tv commercial” and a weird free game called Noroi no Yakata (呪いの館).

See also:

• SoftBank's White Call TV commercial: http://www.youtube.com/watch?v=9HKRzs1CV0Q
• Wikipedia article (JP): 呪いの館
• Pixiv encyclopedia (JP): 呪いの館
• Nicopedia: http://dic.nicovideo.jp/id/114588

(Prokofiev's “Montagues and Capulets” was used in both the TV ad and the game.)