Cute romance manga

As an incoming freshman, Chiken Sana chose to attend Minowa Sougou High School for its flexible school policies and also because her “eye candy” - Ugou Kanato - is rumored to be a student there. When she finally meets him due to a series of coincidences, she gets pulled into something unexpected…?!
What will happen next in this ultra fast-paced love comedy?!

"At 17 years old, we’ll have our first…”
Karen is head over heels in love with her childhood friend, the brusque and fierce-looking Mii-kun. Day after day, she makes amorous advances toward him in hopes of making him her future husband. But when it’s just the two of them, she can’t help but feel a little nervous…?

Because of her appearance and her behavior, Yoi has been continuously treated as a prince, despite being a girl. One day, when she already accepted being put into the role as a prince in high school, she somehow got entangled with one of her Senpais at school, someone who's also being called „prince"?

Wolf-man Ogami is a salaryman at a mattress and bedding company whose coworkers are all sheep. Normally, this lone wolf keeps to himself, but his job in this new department is both a blessing and a curse. Ogami has a crush on an adorable sheep-lady supervisor and it appears to be more than just a case of mere puppy-love…
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Office rom/each other’s first love/side couple/older male younger felmale

Inoue-san, you're my first boyfriend...", says Yamamoto, 28 years old.
"I don't have a lot of experience either, but we'll work through it together", says Inoue, 32 years old.
In reality, Inoue's never been with a girl either, but he couldn't tell Yamamoto that.
A fluffy love-comedy about the adventures of this innocent and pure couple.