If you try out "Date Key Never Sleeps - From AI: Somnium File", you can get a trading card [BitSummit 13: Spike Chunsoft Booth]

If you try out "Date Key Never Sleeps - From AI: Somnium File", you can get a trading card [BitSummit 13: Spike Chunsoft Booth]
We will introduce the booth of "Spike Chunsoft", one of the exhibiting manufacturers of "BitSummit the 13th: Summer of Yokai"....

The linked article is in Japanese.