Decadent Purin at Butter “Mass”ter Living Room (バターマスター Living room)

Butter Masster is a popular cafe and dessert shop located in Suginami City, Tokyo. They have original mascots that they sell on merchandise both in-store and online.

Address: 〒168-0063 Tokyo, Suginami City, Izumi, 1 Chome−23−17 ピース和泉

From their website