I dont think you need to wait for it to finish tbh. Each chapter has different story that doesnt really connect to each other, so you can enjoy one chapter at a time. Cuz man its soooo good, dont hesitate anymore, Im telling you, youre missing out （/TДT)/
I mean 1 vol at a time (⊙…⊙ )
I don't think is gonna finish anytime soon, the mangaka still updates and is active about it on twitter, she is selling a lot too.
The plot is Slice of life so it can go on a lot, telling us about each step of their relationship, maybe she'll continue until they grow old together and it works.
Personally I think is fine, BL's aren't long, this is one of the few works that is past 5 volumes and still going strong and its fine.
If you want to read it is always going to be here, if you prefeer other stories or shorter stories theres a lot of options too :)
You can also read it up after they graduate, along with the sexy doujinshis, the story starts to go "longer" and has a different atmosphere when they are adults/university students. But if you are not interested, their graduation day is a good conclusion for the story too.
Can someone please tell me if this will come to an end anytime soon? I started reading it like 10 years ago, still remember loving it but didn't have the time to continue back then until I forgot what was going on so I decided to re-read after it's completed... Been waiting for that time to come for over 5 years now