While no character named Michiru appears in the available information about *Omoi no Kakera*, the narrative centers on Hina Satou (occasionally referenced as Rina Satou), a 13-year-old girl living in temporary housing within a Miyagi Prefecture port town scarred by the 2011 Tōhoku earthquake and tsunami. Having lost her mother to the disaster, Hina resides with her father and channels her grief through figure skating. Her discovery of a time capsule she buried at age six ignites a journey through suppressed memories—of her mother and the earthquake's aftermath—propelling her toward emotional healing. The story, confined to a single special episode without extensions, depicts Hina's resilience in pursuing her dreams amid hardship. No details exist regarding Michiru in this context.