Takutore!

Chapter 2: Two Ways To Squat And The Side Lunge
Chapter 1: Chapter 1
Chapter 3: Back Straight Training
Chapter 1: Chapter 1
Chapter 3: Back Straight Training
Taku, a high school student, is depressed after being diagnosed with being on the verge of obesity. At an event he attended to heal his heartbreak, a woman he liked asked him to do something... he starts training at home!