Romance manga

Ai Morikawa is a hard-working career woman at her job in Tokyo. After a long night at work, she returned home on the last train to find a handsome boy at her door. The 16-year old Nagisa is her sister's stepson, suddenly sent to live with Ai when his parents left for an overseas job. Wary like cats, these two loners 10 years apart in age will have to make a new life together.
[Older girl x younger boy]

Story:Cool beauty senpai x virgin-kun kouhai?!
Aiming to get a girlfriend with his college debut, what appeared before Kouhai-kun was a beautiful, smoker Senpai?!
Generating a lot of buzz on Twitter and Instagram, this clumsy love comedy starts its serialization!

Saya is a "modern" and uninhibited woman whose greatest passion, however, is her work. His workaholics ended up removing all the men with whom she had a relationship, who complained about how much Saya was "married" to her work. One day a new employee starts working in her company; Ryouichi Kiriyama seems different from any other man she has ever met, but she still doesn’t know that underneath Kiriyama’s facade, he hides something else ...

The "new sibling romantic comedy" revolves around Masamune Izumi, a light novel author in high school. Masamune's little sister is Sagiri, a shut-in girl who hasn't left her room for an entire year. She even forces her brother to make and bring her meals when she stomps the floor. Masamune wants his sister to leave her room, because the two of them are each other's only family.
-Anime adaptation
-Adapted from novel
-Romcom
-骨科（？）

Sakuradaimon Tougo is the school's prefect. A prefect is a student who is authorized to enforce discipline. As a prefect, he's supposed to be a role model to other students, but unfortunately he's not perfect. Kohinata Poemu is one of the people who Sakuradaimon Tougo has tried to discipline into wearing appropriate school attire, but she has thus far been disobedient.
And so this is a story of the two interacting with one another.

Nagatoro is a freshman girl in high school who loves bullying her Senpai. But he puts up with it, even after being put through all kinds of embarrassing situations, because he's in love with her.
-Anime adaptation

An otaku’s idol moves right next to him. And it’s a dream come true! But as it turns out, she’s a bit more sadistic then we expected. Are you seeing a trend here? There is no mercy. Submit to the bully girl of your dreams now. -Orchesc/a/ns

Alternative name:Dangers in my heart
Kyotaro Ichikawa, a boy barely clinging to the bottom rung of his school’s social ladder, secretly believes he’s the tortured lead in some psychological thriller. He spends his days dreaming up ways to disrupt his classmates’ peaceful lives and pining after Anna Yamada, the class idol. But Kyotaro’s not nearly the troubled teen he pretends to be and it turns out Anna’s a bit odd herself.
-Anime adaptation