I have 3 main reasons.
1. I would admit the TV series is not so perfect, one of the reasons is the limitation of time and space. But I would like to mention, the whole story of the galgame is far more wunderbar (unfortunately I didn't find the game on imdb). By making different choices you may experience how you will continue the life with different people. One thing different from WA2 and some of the galgames is, the feelings here are so real, it's like a replay of life.
I would also like to mention that, people growing up in East Asian/ more introverted / having emotion trauma, etc, may have more resonance with the story. One thing I feel surprised and interesting is that WA1 even only got 5.6 (as in 17.10. 2024). For this type of stories, when they talk about love among young people, something may fit the fantasy and psychology for the groups I mentioned above better, while for most Audiences on IMDB, that's something they may never have to think about and hard to understand. I would not conclude things roughly to culture difference. But as I am able to "vote", I would say it's just a TEN for me.
2. This story has become an important memory in my life. No matter those happiness, or those sadness. At that time I was young, I met many fantastic friends because of it. I did many things I've never done before. I played in the bands, I learned the guitar and bass. People met, and people left each other. For a period I got depression, I lost "die natürlichen Selbstverständlichkeit", so far I am still not sure how to describe and explain everything. But only great piece can have such huge impact on human, right? XD
3. For the music, for Uehara Rena, Naoya Shimokawa, and everyone, and character voices, it's absolutely no doubt a TEN. (For the picture... I love Takeshi Nakamura's style a lot but.. Takeshi kun, you can do better, I trust you)
