Manga by author Takanashi Mitsuba

From Matteiru Scans: The events of a schoolgirl's sixtieth birthday. Kisaragi Sumi continuously took care of her grandmother, father and mother until she turned 60 years old without ever falling in love. One day after finishing her mother's funeral service, a cat calling himself Rei appeared and granted her wish to "experience her youth again". What happens when Sumi gets a second chance as a 17-year-old high-schooler once more?

High school is difficult for most kids. But for Kayano, a shy girl whose single mother seems to work all the time, it's even worse than usual. She's so afraid of drawing attention to herself that she can't tell the handsome Kamijo how much she loves him until one day she finally gets up the courage to write him a letter confessing her feelings.When she goes to give him the letter all her plans go awry. She's given the letter to the wrong person!Accidentally, she's given her love letter to Takeru Edogawa who just so happens to be the school principal's son, head of the delinquents and the notorious "Prince of Attraction"! To Kayano, he seems like Satan himself. Not only is he devilishly handsome, but he seems to take the utmost pleasure in making her suffer.Things only get more interesting when Kayano's mother comes home one day and announces she's getting married again --- To principal Edogawa! What will Kayano do when she has to live with this devil 24/7? How will she cope with her literal "Hell on Earth"?

From Viz: All that matters to 15-year-old Nobara Sumiyoshi is volleyball--shes an awesome player with big-time ambitions. But sometimes it seems like a girl just cant get a break in the competitive world of high school volleyball. Nobaras family wants her to inherit the role of "young mistress," serving rich patrons at her familys old-fashioned Japanese restaurant. No thanks! When Nobara transfers to Crimson Field High School, known for its top-notch volleyball team, it turns out that her mother will stoop to dirty tricks to keep her off the court. With assistance from her feisty Aunt Momoko, whos got some connections at Crimson Field, Nobara decides to start playing offense.