 If you liked Yahari Ore no Seishun Love Comedy wa Machigatteiru. |  ...then you might like Nisekoi |
It has the same atmosphere where they are brought together by an unlikely force to be done so.
If you liked a light hearted comedy romance like Nisekoi, you will like Oregairu.
- the way the relationship is building between the female characters - mcs are very different but what they have in common is the feeling to protect his friends - the love situation between the main characters is pretty much the same, only thing different being their reasons and underlying desires with each other - the story follows the character development of all the main characters pretty closely
The main characters are forced to be very close to a girl. They don't like it at first, but ends up getting along very well.