It is very difficult to write a review about such a short story, but I will try anyway.
"I Am Currently Living with a Bear" is a one-shot about a man who has turned into a bear. He behaves like a human, but looks like a bear. The doctor has explained to him and his wife that this change of shape is due to stress, and they start a treatment.
The story in itself isn't that elaborate. We get to know the real reason for this metamorphosis, and that's it. If I write anything else about the "events" in the story, I would be telling the whole story, so I will stop here.
One-shots in manga or manwha are like short stories in literature, but I sometimes find them closer to poetry. They are sometimes like a shot to the senses. The plot isn't as important as the feelings and sensations they generate in the reader. I think that's the case with this manwha. When reading this kind of works, this must be taken into account. If you are expecting an elaborate plot, you should look somewhere else. However, as simple as the plot structure may be, the matter it deals with is of great depth.
"I Am Currently Living with a Bear" is bittersweet... a very sad story... but not the kind of sad that makes you cry. It will rather make your chest squeeze a little.