Natsume Yuujinchou, Fukigen na Mononokean Recommendations
How do we come to acknowledge others who are too different from us?
Humans and yōkai (and each individual relative in these particular groups) are vastly different from one another, and it is in this difference that misunderstandings come about and stereotypical images are formed. However, in the midst of this glaring gap in beliefs, the characters are propelled into the sphere of acceptance and, consequently, grow. These are stories of empathy and broadening of worldview using human-yōkai, human-human, yōkai-yōkai interactions in times of straightforward helplessness and even in mundane happenings in life.
Both have kind of episodic slice of life stories about youkai, revolving around the main characters who are able to see them and how they deal with the fact that other people can't. There's a really adorable youkai sidekick in both manga, and kindhearted main characters. Both also have bromance. I enjoyed both thoroughly.