From Nevermore Scans:

Ayahatori--that is the name of the family possessing a mysterious power. They have the power to summon and use beings and people from secret ancient writings.

During the Ayahatori initiation ceremony, high schooler Kozakura Saaya summons one of the three most beautiful women in the world, Ono no Komachi. However, what appears in front of her is a man with matchless beauty!?

At the age of sixteen Ryo Narushima was a genius and looked to have no trouble of getting into Tokyo University and joining the elite of society. However, that summer something cracked inside Ryo's head. With a small knife he brutally murdered both of his parents only leaving his sister alive and cowering in a corner. It is at this grotesque incident that our story begins...

Momoko is a shy girl who spends all her time reading girly novels. She longs to fall in love like the heroines in the stories she reads, and one day her dream seems to come true! After a fateful encounter worthy of a novel, Momoko decides she's in love with Oshima, her school's ace baseball player. But how can she get closer to him?

After consulting her precious books, she eventually ends up helping to revive the unpopular traditional Japanese cheering club to cheer at the school's baseball games. However, they've only got just enough members to keep it from being abolished, and none of them seem to know exactly what they're doing. Their first performance is so dreadful that people even blame them for the baseball team's defeat! Their ragtag cheer squad will have to get its act together if Momoko is to have any chance of realizing her fiction-worthy romance!

(Source: MU)