Yume Shikki (sometimes referred to as Yume 4kki) is a fan collaboration project created by users of 4channel/4chan's /v/ board. The gameplay of Yume Shikki is that of a traditional fangame and involves exploring a variety of different worlds and collecting various effects. No endings or end goal exists in the game. The protagonist of the fangame is Yotsuba Koiwai, the main character of the Yotsuba&! manga.