放題 => doing as one pleases; to one's heart's content; leaving uncontrolled N1
~しいしい => Every once in a while... (Repeat situation) N1
Repetition, habit
らしい => It looks like N3
Situation
てもよろしいでしょうか => May I... N4
Allow
いたします => to do (polite form of します) N4
だけしか~ない => only N3
しか~ない => only; nothing but N4
いつしか => before one knows N2
Accept, agree
いかにも…らしい => indeed; really; truly N3
Accept, agree
たいして…ない => ~is not much of~ N3
Emphasis on degree
もしかすると/もしかしたら~かもしれない => perhaps; maybe; perchance; by any chance ~ N3
~いはしまいか => whether or not; considering options N1
Base, base