A vanilla/romance manga needed

okay so I was reading a manga(shoujo) and I was totally shipping the 2 MC's but I was caught off guard when it turned into NTR(well not really because the series is not done yet), everything was cute(IMHO) until the girl's ex came along. so I wanted to kill my time with other mangas that doesn't contain love triangles or has ntr-esque feel into it, I wanted to check out some mangas for myself, but I don't want to fall in the same trap again(honestly if my fave character gets ntr'd, I feel ntr'd too XD yes I'm that shallow haha). I have nothing against ntr lovers, I just tend to avoid the sub-genre. Just wanted to see some vanilla-ish mangas so can you guys can recommend me some?again,just like my previous post, I would like it if it is Older girl younger boy as much as possible(yes. I'm into that XD)...

A vanilla/romance manga needed