Nanairo Kakumei

Borh are shoujo anime with 3 very short episodes, with similar character design and romance as the main couple is a shy blonde girl and a boy with blue hair in both of them 

I can see why you’d be surprised to see this as ‘similar’ but in a few ways they are. Especially the lead character; a pink haired girl with ‘bear-ear’ twin bun hair style who has serious mental health problems and a strong attachment(love?) to a ‘weaker’ girl she thinks she can control like a puppet on strings. Satou really reminds me of an older Yuyu who’s been pushed to her absolute limit! The pair have a lot of differences and there are circumstances you cannot ignore in both series. To watch these, especially Happy Sugar Life(which has much more mature, problematic, themes to it), it’s best to keep open mind or enjoy the Yandere trope, I guess xD In both series, the pink haired lead’s actions are definitely not positively portrayed. Can it still be ‘love’..? What is ‘love’? These sorta of themes pop up in both. Both series the animes are just the tip of the iceberg “trailers” for the manga- where they take it up to 11!- but are still enjoyable! The visuals are pretty(do note Nanairo Kakumei is an older and much lower budget anime), the seiyuu do a great job and the music is fitting! If you enjoyed one, there’s a good chance you’ll enjoy the other :D If you want something like Happy Sugar Life but lighter, try Nanairo Kakumei and verse visa.  read more 

Both are very short anime specials made to promote their manga. The artwork is very pretty in both of them. They are both romance stories and from the point of view of the female lead! If you only have a couple of minutes time, want to watch something quick and get a small insight of some shoujo manga these are pretty much perfect for you! and I'm sure if you liked one you'll like the other as well :)