Earthquake Inside Your Closet's Manga

This manga is a spin-off but can be read on its own without having to read the main story. It followed the path of a former yakuza who once had someone he loved but was never able to express it until his love interest died. The grief and regrets he had kept haunting him ever since then. The love that he showed was barely noticeable but was definitely there. Though we only had a glimpse of their limited interaction before the love interest died, we could feel the angst and pain that he bore up until now. This story was supposed to bring him out of the never ending darkness by a chance of a meeting with the love interest’s little brother who looked exactly like his aniki. A story about unrequited love, grief, and hope for the future.