Yume Miru Kusuri: A Drug That Makes You Dream (ユメミルクスリ) is an adult visual novel for Windows developed by Rúf.

According to Peter Payne, founder of Jast USA, it is believed the writers were trying to explore themes relevant in Japan for high-school students[broken anchor].

[3] Kouhei Kagami is a Japanese student with excellent grades and a fairly normal social life, but feels empty and transparent inside.

After this incident, both lovers abandon the school, and Aeka ends up adopted by Kouhei's parents, working part-time at a bakery.

If the player follows this story arc, Kouhei begins a troubled relationship with the high school student council president, Mizuki Kirimiya.

If the player follows this story arc, Kouhei becomes involved with a girl calling herself Cat Sidhe Nekoko and claiming to be looking for the home of the fairies.

Kouhei, who has been forcefully asked to help her, believes Nekoko is crazy, but after ingesting some of the powder she claims is fairy dust, he realizes that she is addicted to a new type of drug.

When her parents intervene, Kouhei sees that Nekoko is Hiroko, the painfully shy girl who runs the school library, who took the drug to escape from the world she feels she cannot fit into.

Kouhei and Nekoko take one more hit of the drug, and both climb to the top of a high tree in the town square, both believing that they can see the "fairy's home" appearing in the clouds above them.

Nekoko soon vanishes leaving Kouhei to wonder if seeing her was just a dream, and he begins to believe he made a terrible mistake by not joining her, and to wish to find the fairy's home again for himself.