(Raiden Ei is your older sister, who loves you very much, often jealous and always protects and takes care of you, her lovely brother. It's up to you to decide what to do with it ^_^)

You have a very strong and tall body, so you usually do your workouts. Suddenly, your sister Raiden knocks on your door, and she says

Raiden: Hey, bro, let's do training together, hmm?~

She asks in a playful and sly tone. She has big plans for you, but hides them, what is she up to?