If I had to guess, maybe Reika overhears the commotion downstairs and escapes from a bedroom window. When the yakuza are distracted with all that, they decide to hold Husband and Wife as hostage, giving Husband a moment to think about his next plan
this is sooooo tense lol
Although I like Breaking Bad, I hope the protagonist doesn't become a "badass". I really like seeing an ordinary guy accidentally entering this dangerous world and having to esacpe as best as he can, as opposed to willingly looking for excitement and danger