I've seen this manga recommended a few times online. I'm interested, but I don't like to go into series without knowing a little bit more about them. Can anyone answer a few questions about it for me?

Could you tell me if this story has a happy ending?

Is there anything that might be particularly upsetting (such as violence or sexual assault)?

Thank you

haven't read further than the 1st chapter promo
most people are familiar with the other series by the author https://www.mangaupdates.com/series.html?id=26570
which won all kinds of awards; and did contain the kind of triggering content you described(mostly in flashbacks)

I think bittersweet is something of an understatement describing the outcome of that series.

most of the reviews I read praised Ao no Hana's peppy dialogue, so I imagine there's a lot of characters being called out on their passive aggressive BS

the author announced last week it was ending Blue Flowers Ceramic Garden with a new series scheduled for August 2022

skimmed the spoilers. speaking on the actual work itself without giving too much, there's drama, but it's a happy ending.