Kimi no Iru Machi has a lot of confusing romance situations. 5 different 'romances' jumbled up between characters. Although it is আরো like a প্রণয় square because two of the 'romances' are one sided.
It's an interesting জীবন্ত btw, I almost dropped it after the first 2 episodes (I thought it was boring) but I'm so glad I stuck it out. It was definitely entertaining and I had mixed feelings about the ending. আপনি could really feel the character's dilemma. It's one of the few animes where I was both mad at and happy for the main characters at the end.
There's a প্রণয় ত্রিভুজ between Juvia, Gray and Lyon (Fairy Tail). Juvia is in প্রণয় with Gray while Lyon is in প্রণয় with Juvia and Gray doesn't প্রণয় anyone (or he hasn't confessed his feelings yet).