What is a harem web/light novel series where the lead female is the childhood friend and she is the first to kiss, confess, sleep with, and get pregnant by the lead guy? Note I am looking for a series where the lead female is either the bustiest or second bustiest of the harem girls. As such, she is regularly groped (consensual, of course) by the lead guy. Also, though the lead guy might sleep with the other girls, he doesn't do threesomes or orgies and each love scene (one-on-one with each girl) is like what you might read in "Shinmai". However, the lead girl is the main object of his affections. Remember: no threesomes or orgies or the like!
So.......you want it to be focused on childhood friend. Why do you want a harem in the first place tho? Just curious.
I will lurk for now . The only novel I know that you want is Mushoku tensai and Sevens only for now that I remember.
Strangely enough, this fits almost everything except the bustiest. The 'main' female lead has almost no breast. And of course, it'll take you like several volumes (more than 10+!) before you get to that part
Those are the absolute worst. There's no point in the MC having a harem if they're not all equal. Otherwise just make it a normal romance.
One of my favorite harem series is Sekirei (manga and anime). Musubi/Yome (the latter's spirit resides in the former's body) is the girl that Minato picks and clearly leans more towards. However, he does become close to Kazehana, Tsukiumi, and Matsu.
An exception to the threesome-type thing: if it is a person who has 2 souls inside of them but occasionally switches between, that is fine! For example, Soul A is the main body while Soul B is experiencing the pleasure but from inside the body of Soul A or vice versa! Now, if Soul A and Soul B (provided one is not a reincarnated gender-bent version of the other soul) are both there at the same time in separate bodies while banging someone, Hell to the no! This site has a database of many lesser-known web/light novels, so one would think that at least 1 series meets all the requirements in/of my opening post!