Sekai wo Teki ni Mawashitemo

Since her dad's death since elementary school, Kamura has taken the role of being the responsible one in the family, including cooking, cleaning, and simply even getting her mom up for work, whom she promised to always protect. But then her mom tells her that she is getting remarried, and finds out about her soon-to-be 2 years older brother-in-law who she just saw homeless on the streets the day before! And now her friend Youhei, who always teases and makes her feel like a fool, is acting differ...