Hoping this arc will end real quick, there's only two possible outcomes that I can see for this. Only one of which is good.
The first Kenichi breaks through Miu's brainwashing after a big beating and they're closer than ever (not likely).
The second and this is the one I think will happen after Miu beat him near to deat Kenichi finally gets through to her confessing he loves her. Only for when they get back Miu advoids him due to feelings of guilt due to the beating she gave him and hooks up with Takkeda. After which Kenichi leaves to get his head together afterward and ends up traveling the world getting stronger.