Here is a Professor Layton copy-bon doujinshi with the Layton x Luke pairing that I got from suruga-ya! There is not much to this doujin. Just Layton doing things with Luke in 3 different artstyles. There are 4 pages dedicated to 2 of the artstyles and Piyotto March gets 3 pages. All 3 sections are really good and cute! Hope everyone enjoys!
https://www.mediafire.com/file/ibyo2wo9x2ruap7/%2528Piyotto_March%2529_%25E3%2583%259C%25E3%2582%25AF%25E3%2581%25A8%25E5%2585%2588%25E7%2594%259F%25E3%2581%25AE%25E3%2581%25A8%25E3%2581%258F%25E3%2581%25B9%25E3%2581%25A4%25E3%2581%25AA%25E7%25B4%2585%25E8%258C%25B6.zip/file
PS sorry for the see through pages. This doujinshi is a copy-bon so the pages are super thin.