Characters are Tatsumaki and Fubuki from One Punch Man.
With the mighty Blizzard shrunken down to only an inch or two in the last battle, Fubuki's overbearing older sister Tatsumaki decides to keep a watchful eye on her. Fubuki complained but could do nothing as she was placed on her sisters bedside.
All was fine- until Tornado felt an itch... her psychic powers subconsciously reaching out for something to scratch with.
...
She'll probably be fine