
On the official website of Shogakukan publisher's Betsucomi magazine, it was announced that the manga written and illustrated by Risa Konno, Mune ga Naru no wa Kimi no Sei, will inspire a live-action film adaptation.

More details will be revealed in this year's eleventh issue of the magazine, scheduled to launch on October 13 in Japan. On the other hand, Konno published the manga in Shogakukan publisher's Betsucomi magazine between October 2012 and August 2014, with a total of five compilation volumes.
Mune ga Naru no wa Kimi no Sei Synopsis
We share the same feelings for each other, but he has never realized it. Even so, I love it. It's what I haven't been able to stop thinking about for the past two years.
Source: Official Site
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