Oh man I totally forgot about the time capsule. Does he need something related to the person he's trying to save in order to go back in time?(ex. Save Hina, use naoto to time leap. Save Mikey, use something important to Mikey?)
The fact than Hakka remembered the time capsule after 12 years, while Takemitchy forgot about it despite the fact that only a short time passed for him would be unsettling, if one didn't expect it...
So probably gonna be something like Mikey " sacrifices himself " as a bad guy to be sure nobody from his old gang end up dying by controlling himself the criminals organization.