Ok so I did my research just for this comment XD and I found it!! Its called Hypnosis Mic:Division Rap battle - Rhyme Anima(This is the anime title).Its going to have an anime adapt. on Oct. 2 2020.You can read the manga on tumblr and the link is on Twitter(cuz I cant copy it cuz I’m using my phone Lol). @slug_hypmic and don’t read it on mangago cuz there taking there translations without crediting them.The official twitter account of Hypnosis Mic is @hypnosismic_RA if you want more information.This is also a rhythm game that you can play on IOS and Android (but i can’t find it on mine maybe because I’m not on US..?maybe).Hope this helps!!!(づ￣ ³￣)づ
there are also songs on youtube
The picture in the end who are those two from??