DakimakuRunner

A mysterious misanga that makes wishes come true... College student Kazuya is reunited with his former high school sweetheart, Aoi, for the first time in three years. But in the heat of a quarrel, he somehow ends up turning her into a hug pillow! Thanks to this, Kazuya is being chased by the police! The chance to get Aoi back to normal is in a week. Until then, run, run, run!

(Source: Kodansha, translated)