Beautiful BxB

1-3, 6-21) Rutta to Kodama
Ruizaki Takao has a new roommate: transfer student Miyagi Kodama. Ruizaki's a rough guy who gets into fights all the time, but he's gentler around Kodama and the two eventually become close friends--until one day, out of the blue, Ruizuki confesses that he's in love with Kodama... and thus begins their relationship.
4-5) Torao and Tatsumi
The 'Western Tiger' Torao and the 'Western Dragon' Tatsumi...

1-4, extra) Calorie - Heat
Toshiyuki has loved his best (and heterosexual) friend Yasuhira for 15 long years, but decides to give up his fruitless love. Then Jun, who is their mutual friend and knows about Toshiyuki's unrequited love, comes forward as a candidate lover. Toshiyuki is glad despite knowing that Jun has always comforted his broken heart whenever Yasuhira got hiself a new girlfriend. Yet, he decides to take his first chance in love....

This manga has multiple stories in it - they are really good. Each one is set in school but has different plot. Mature.

One day, Yajima, who kept on having physical relations only with older partners, met a young man, Watabe. Younger guys were never his type but the hot sex he had with that man made that night unforgettable. What will happen to Yajima, who since then keeps on wanting to have flared up sex with Watabe again…?

1-3. The Heart of Miscalculation
"Why don't you date me?" And that's how Miki started going out with Udou, from next door's classroom, who was trying to avoid a girl. It was because of a whim, just a "game". But being with Udou started getting too intense. During the sex, Udou took control of him, making him tremble in pleasure. Tender caresses, sweet passion? What happened to my body? Damn, I'm not like this.
Another 2 stories there.

Ioroi Shinya is known as the playboy photographer who will do anything to get a good photograph. He is in charge of the gravure models from Tamaki Kotarou’s publication, who is an outgoing manga editor. This is a battle between two seme’s who are both mature experts in love.

“Being captured through this lens… makes you want to be fucked, right?”

Yuzuru is not very popular in high school. Despite his beautiful face his closed personality prevents him from making friends. He goes home as soon as classes are over to take care of his sick older brother. Now, after many years he reunites with his childhood friend, Kotarou. Being open and friendly, Kotarou doesn’t hesitate to invite Yuzuru to hang out with him and his friends after class, despite his constant protests. Worried about his brother, what will Yuzuru choose

"You broke our promise, so I'm breaking up with you". Two people so in love in high school who decided to elope. Fifteen years later, Kusaka suddenly tells Mikuriya that they should break up. But why?! Mikuriya's so devoted to him, loves him so passionately and has never cheated on him. So he's stressing over this promise that he can't remember. It is then that he recalls a secret that he's never told Kusaka.

From the back cover: Ryousuke’s nearing 30 and ends up going to his friend’s gay bachelor party to find a life partner. There, he’s drawn in by Shun’s beautiful eyes. The two become closer as they spend more time with each other, but what kind of secret is Shun hiding?

Terrible things happening in succession has college student Sora down, leading him to get lost on his way home. When he tries to find his way back, he accidentally stumbles upon a man gazing at the stars. They chat, and a connection between them starts to form.