Clannad, Steins;Gate: Oukoubakko no Poriomania Recommendations
Ok, so, while these two seem completely different in terms of ideas, the fact is, they have some matching core aspects.
For starters, both are essentially 'slice of life'. That is to say that while there are some strange things that happen, not much of it is outside the realm of possibility. There's a bit of time travel stuff in Steins;Gate: Oukoubakko no Poriomania and there's essentially a second world in Clannad (which plays a role in Clannad: After Story, until which it can be used to see a metaphor for what the main character is feeling).
They also both have a kind of romance