On NACK5’s website, they have posted a special White Day video of Nightmare having a Hoippudekos contest against their fans for White Day. Hoippudeko, or “Whipped decorations,” are small, whipped decorated accessories of sweets, like macaroons, tarts, etc. The “whip” is from something called Decotti, a silicone based cream that’s basically the glue if you have other pieces to join together.
In order for you to view this video, you must be a member of NACK5. Membership to NACK5 costs 300 yen a month.
Source: Nightmare OHP, NACK5 Streaming Site