Based on my experience, any drama with "eternal" related titles have a sad ending. Take a look at Eternal Summer (a Taiwanese Gay movie) or Eternal Sunshine of the Spotless Mind (straight romance, 2004) for example. So, I am a bit nervous if Eternal Yesterday will be no different.

Koichi and Oumi have each other eyes at the first sight, sparked by their different personality. Their relationship set from as simple as having lunch together to visiting each other homes. Same as Once Again (Korean BL, 2022), one of the boy's fate has revealed in the very first episode. For the rest of the series, we might predict they would be together during the journey and we might start questioning whether they would be together at the end of the journey.

I am interested to know what eternal means for Koichi and Oumi but at the same time, I don't want this sweet BL series to end up like the previous BL series: Once Again. As an audience, I am hoping they will be eternal together physically and emotionally, not just spiritually. I guess I hope they will find a way if they freeze yesterday to eternal, they will have a way to move forward together to eternal today and tomorrow.

This series seems to be shot in the Japanese countryside during the spring, so the background and the landscape scenes look nice. Editing frame by frame seems okay for me with this type of low-budget series. The casts look like professional actors and still form their acting craft. Music is also nice, offering a spring vibe in the Japanese countryside.