I remember when this started as a "Harem" but got reduced into a dumb hentai... with NTR... a bunch of NTR.
Fear not, the main chick get only imaginary sex scenes with other guys (the female author struggled with herself not to cuck the MC) but allowed ALL the other chicks to get raped and gangbanged. I kid you not, the secundary FMC gets raped and gangbanged much later in the story as also the hottest girl here -> the school nurse, not only turns into a dumb cumpumster but also has the typical "calling MC on the phone while getting fucked". Obviously this got axed as the ending was very rushed and nothing made sense at the end.
So no wonder that after almost 2 decades no one picked it up again. Dont worry, I read this crap when I was still in my teens. I really got but hurted about it as I was not really sure what fuckery a woman (author) is capable. But hey! "aS LoNg tHe mAiN gIrL dOnT gEt fUcKeD iN rEaL tHeR iS nO nTR" fuck off.