Ravens Scans has chapters translated up to 130 in Spanish on their website as recent as Oct. 3rd, but just aren't uploading anything here for whatever reason. In fact they haven't uploaded chapters of any of their series in English in at least 3 months. The entire series has been up on Rawkuma for almost an entire year now.
MC is brown haired normal dude. Red haired Aqua, white haired Titty Monster, and black haired childhood friend are in love with him. Red haired Aqua has confessed to MC and MC has reciprocated and they have fucked. White haired Titty Monster just realized her connection to MC will never be on the same level as the other two but uses that reason to never give up on her love. MC has been best friends with black haired childhood friend since childhood, and concerns for her a lot, but no romantic feelings (from MC to BH CF) that are obvious so far.
it's not NTR... MC was never in a romantic relationship with black haired childhood friend.
Edit: This is what has happened at the time of posting. This may change.
That being said, She's not MC, so it's not NTR, since that requires either her to be MC or no MC.
You could say Reverse-NTR, but that one is usually more hardcore.
To explain on the NTR thing properly tho, it just means "To be taken from", There is no requirement for a relationship, technically MC having a crush is the most that's needed. (that is also a common theme in NTR)
I'm honestly surprised how few people that read a lot of manga don't know this, since they mention it a lot.
Classic example: MC likes girl (or childhood friend), sees girl talking to another dude and looks like they're getting along, MC getting NTR'd by him is mentioned, now if your not reading trash, it's just MC overthinking, and nothing is happening. (or if the dude is hitting on the girl he gets rejected).
Unless it's Rent-a-girlfriend, then the dude pays her and she dates him, or she never rejects him, and keeps him around while rejecting MC despite saying she loves MC.
Just your reminder that rent-a-girlfriend is trash