Secchun, who moved away when his mother remarried, was invited to live together with a childhood friend so they could both attend the same high school. Little did Secchun realize that reuniting with his friend would go 'beyond' his expectations.

From Yen Press:

Fiesty, fierce Rinna Aizen is a girl with a dream — to follow in her father’s footsteps as the legendary captain of Shoryu Senior High’s cheering squad. Only problem? Shoryu High is an elite all-boys’ school! Or it was…until now! With the school going co-ed, Rinna might be one step closer to achieving her dream, but the road to a successful cheering squad is still full of hurdles…can Rinna clear them all?!

Love Allergy is about a girl whose name is Hitoe. Her father is an extremely famous artist and Hitoe has the same passion as her father as well. She has God's skill when it comes to drawing and painting, but Hitoe herself decides to quit drawing. It is because her heart is broken. Hitoe's teacher who is also a famous artist and a friend of her father is going to get married, and she loved him more than anyone. Considering the fact that Hitoe is at a very sensitive age, she decides to give up drawing which attracts her teacher, Nakada.

Long ago, couple suicides were common, but some left with unfinished business. Now some 'destined couples' have been reincarnated in the present day. Each has a reminder of the past: a butterfly-shaped birthmark on their thumbs. When the marks touch, they catch a glimpse of their shared past, though what they see doesn't always match.
Tsubame insists that he and Kanoko are fated to be together. By the time Kanoko finds out it's not true, it's too late: she's already fallen for him. The "butterfly" friends must reconcile their ties to the past with their present desire for fun and romance!

From Entropy:

Ageha is a high school student who has taken over the role of housewife ever since his mother passed away. He has two younger brothers whom he must care for, and a useless father who is always out dating women.

There's a girl that Ageha likes--his classmate, Nina. She tells Ageha that she's in love with a handsome, popular singer. Ageha decides to sing on stage at an open mic session to prove to Shinna that he can be like that guy, too. But just after he starts to sing, someone interrupts and abducts him! The stranger is no other than Miyamoto Range, the singer whom Nina loves.

Range wants Ageha to join the Shibutani Alliance Cub—his band—and is relentless in his pursuit. At first, Ageha thinks that Range is annoying. But little by little Ageha is won over by his charm. Will he be able to accept Range? Will Nina ever return his feelings?