Spring in the Heart

A barren world where all flowers have disappeared and spring is non-existent. The only way flowers can bloom and eventually bring spring back is through a love virus that enables the human heart to bloom flowers. Can Mahger and Pansey fall in love and revive spring with their love?

(Source: Lezhin)

Notes:
Disqualified and discontinued due to copyrights issues (the flower disease is patented under the name «Hanahaki» by Matsuda Naoko )
The series is getting a remake with the issue fix and different character designs, no official date has been announced as of yet.