It's about Touhou 12. The UFO ship is called the Takarabune ingame, IIRC and I've seen theories online about how the UFO crew paralel the seven immortals.
UFO happened. It got a ship the main characters calls Takarabune (or Treasure Ship) where the UFO crew (minus Kogasa and Nue) belongs, where one of them is the disciple of Bishamonten.
Hatsuyume"First dream" - The dream seen the night of January 1.
Hakurei Reimu / BishamontenFortunately I had a lucky dream after all.Art by 摸捫窩 (Momonga)Moriya Suwako / EbisuYakumo Yukari / HoteiInaba Tewi / DaikokutenIbuki Suika / FukurokujuYasaka Kanako / BenzaitenKirisame Marisa / JuroujinI felt uneasy and nervous before sleeping on January 1.However, it was little more than an illusion when I woke up."Takara" - treasure
It means "Takarabune", the treasure ship of Shichi Fuku Jin (the seven lucky gods). If you want to dream a lucky Hatsuyume, put a picture of Takarabune under your pillow.
This kanji should be originally "獏 (Baku)", Japanese nightmare-devouring creature. However, the artist changed the kanji on purpose.
Poetry by 蒼桐大紀 (Aogiri Taiki).
He is a webmaster of a novel website.
His site: "祀色工房"
* This form of Japanese poetry is called Dodoitsu.