@Darklight99 I just re-read it, you are right, but she never became a 'true' rival, It was handled pretty poorly but I prefer when there isnt a love triangle (or worse, harem) anyway. Someone ends up hurt all the time, and most of the time is the childhood friend :'(
@WhiteEkans I think the fact that she never became a true rival is basically what's gonna happen. Both leads love each other a lot, no new girl or boy has a chance of getting in between them. It was handled pretty well.
I love it when shikimori first saw the onee san,millions of sweat has gone down thinking it was a love rival.
Also, Hot Onee san Character is on the loose
@Darklight99 if it was a new boy i would really hate it,but i doubt shikimori's interested in it.Izumi's the one who got alot of love interest cause he is pretty frail like a girl which is the opposite of shikimori.