The beauty of romance anime is its ability to converge several different genres into a single plot that transcends the mere title of just being a "love story." This widely loved genre is able to embrace almost all sub-genres effortlessly to produce stories that are both in romance and other emotions like friendship, heartbreak, coming-of-age issues, and more. However, one of the most explored and widely received relationships in romance anime is friendship, which is often as strong of a theme as love.
Source：https://www.cbr.com/romance-anime-friendship-themes/
