Anyone knows this BL Manga?

Anyone knows what BL Manga this is.... I remember the MC being a cheerful Omega inform of the others. He slept with anyone who let him sleep at their house for a night? Then the ML was a uptight Alpha who disliked people who disrespected omegas and didn't like the fact he was an alpha. MC's family didn't like him cause he was the only Omega in their Aloha family.

And there was a scene where the MC was looking at a narrow river where a empty plastic bottle was floating giving him a very melancholy atmosphere. The ML saw him that say and was startled cause he never saw the MC being sad.

And yeah the MC had many ear piercings.

And the reason he didn't like to go home was<spoiler>because his own brother assaulted him</spoiler>


And the last thing I remember was the ML saying he didn't like the MC to his friends and thr MC overhearing it.

So anyone knows what this is?