People call it NTR.....It's not, not even vibes of NTR. This spineless POS simply imagined that he could be a harem king.
Girls at some point i presume liked him and even wanted him to take a step towards them but he played "friends" with them during his middle school years basically what "NTR" guys does but he is more handsome and more positive than POS MC.
In any case do you call it NTR when some POS "thinks" that girls are his when they were nothing more than friends? They moved on, they weren't interested in friendship and honestly even in real world do you often see girls befriending boys?
In my observation in order for man and women to be friends one of the party has to have feelings for the other then "friendship" lasts when both have zero feelings their "friendship" becomes something more akin to frequent acquaintances. It's very (like really rare) when maleXfemale friendship lasts or blossoms without any attraction.
During my school years and young adult years we invited girl to the party not because we found them interesting, but because someone might "score", so that party wouldn't be called "sausage party" or to have more people. Now that I'm older I'm content going out with just my friends and sometimes with their girlfriends but honestly there's not much interacting with them. They don't understand a lot of things due to gender gap (which is massive, struggles and jokes that men understand from age 0 are geometrically different to women same with men we don't understand or not willing to). Women develop for the most part different hobbies and even if they develop the same hobby POINTS OF INTEREST in that hobby most of the time are different.
Sorry for the rant, needed to establish why POS is POS and why this isn't NTR. All my friends (women) disappeared from my life as soon as I or they established that we will be nothing more than friends(Same with everyone i know, only "playboys" among my circle retained a lot of "girl friends".
Any fool who believes that his partners opposite gender friend is just a friend is playing with a dynamite that has been lit. When gender specific attributes start to appear (aged 6-7) that is when we grow apart and friendship with opposites become something akin to fairytale or unicorn (there are cases but they are few). Also if ever a woman tells you he is just a friend, sit and have serious talk with her and tell a male perspective how some are aggressive pursuers whilst others are crouching tigers waiting for the right moment to catch their prey. (Moments where you have a fight with her, while she is drunk or any moment of weakness from her is an opportunity for her "friend" to take action)