This was such a good watch as the first show of the year. A sweet, hopeful, and cozy watch, with adorable and sympathetic characters you enjoy watching and rooting for. It is a very balanced story with proper mystery elements, dramatic buildup, and emotional stakes, as well as, sweet moments and appropriate humor to keep viewers entertained. Nothing was overdone here. No over-the-top emotional meltdowns or exaggerated humor (which is my main point of dread while watching Jdramas). The plot is not complicated but it works and while there were certain plotholes, they didn't harm the story nor negatively impact the flow so it would be a bit nitpicky to point them out when they were so insignificant.

Summary: A man is stabbed in an alley and left for dead but miraculously recovers after seeing an angel. When he returns home, he finds the angel to be very real and still very much there, crankily asking for food and informing him that he has amnesia and nowhere to go. The humanitarian move would be to give the poor angel a place to stay and so Koukisan does just that!

Plot: As I already explained, it's a cute story that mainly leaves you with warm and fuzzy feelings. It's balanced, not too long nor too short, and every important question of the plot is answered by the end. A lot of aspects are resolved off-screen however as the plot is very character-driven and only focuses on the dynamic between Kouki-sad and the angel which...can be interpreted differently based on the viewer's preferences I guess. For me, it was just a sweet dynamic and I enjoyed their easy banter and development throughout.

Acting: The only real actors of this are the two main characters. While others appear briefly, they are not very significant so I am mostly ignoring them. But the main two actors were both great with Nishimura Takuya having the best deadpan delivery of jokes and just generally looking so angelic and disgruntled at the same time. He comes across as innocent and pure and simple and it was so good. Uesugi Shuhei was also great for his part as he showed the character's development and changes both with on-point expressions and body language. His emotional acting was also very touching and clawed at my heart which I thought was impressive to achieve with only 6, 25-minute long episodes.

Music and production: Tbh, I didn't even notice the music, sorry. Production... it was perhaps cheap? There wasn't much to it as it was mainly the inside of the eponymous "one room" of the title. That said, it doesn't *look* cheap. It looks just well enough for the show. Some flashback scenes to Kouki-san's past felt a bit under-budgeted but since they were not relevant to the present plot, I can forgive the vague setting. In the end, any shortage was covered by good directing choices.

Rewatch: I never rewatch but I can see the value in rewatching this for others. It's short enough.

Overall: Loved it! Recommended. I'm glad to start the year with a good show.