Shiino one day finds out that her best friend Mariko has committed suicide. After snatching Mariko's urn from her abusive father, Shiino heads to Marigaoka Cape, a place Mariko always wanted to go.
My Broken Mariko is a Japanese web manga series written and illustrated by Waka Hirako. It was serialized on Kadokawa's josei manga website Comic Bridge from July to December 2019.