Kanojo no Kuchidzuke Kansensuru Libido Act.1

While hospitalized, Sana meets a mysterious girl, Kousaka Ayane. They become fast friends and often visit each other's rooms, but the time for Ayane's discharge draws closer while Sana will be stuck in the hospital for a while...
(Source: MangaUpdates)
~~ Adapted from the manga "Kanojo no Kuchidzuke Kansensuru Libido" (彼女のくちづけ 感染するリビドー) by Kida Miyuki (寄田みゆき).