Try Knights

also a sports anime about rugby 

You probably didn't click on Try Knights for the rugby. You wanted a sports anime with a lil something ;) (I watched the first episode, I know where they were going with that). Watch a real sports anime with 3D that doesn't make you cringe, and characters who's dialogue flows together and character design that work for the show. Haikyuu has all of those, plus it's sports heavy (even heavier you can watch Kuroko no Basket) and charming (but not as charming as Free!).  

• Both feature rugby prominently. • Both involve a main character who loves rugby but faces difficulty because of his small size. • Both feature another main character that befriends the main character and has more traditional body type for rugby. • Both feature a predominantly or all male cast with good looking athletic characters. • Both have undertones of gay themes, to one degree or another. While All Out!! appeals to a more gay male audience, Try Knights is likely to appeal to a more BL-oriented female audience.