Are you thinking of His Favorite aka Aitsu no Daihonmei? https://www.mangago.zone/read-manga/aitsu_no_daihonmei/
Never Understand is a webtoon and not manga, His Favorite is a shounen ai manga that is very verrrrrryyyyy (!!!) cute. If you really like it, consider buying the official English translations at Sublime website, which has available 12 volumes currently https://www.sublimemanga.com/his-favorite
It's always good to support the official version if you can afford it! The translation and image quality is ofc much better than what mangago can offer. If you do buy at that website, keep in mind that the name you register your purchase through will be digitally printed on the page of most of the entire volume that you purchase, if you buy the ebook. Not sure if it's sold elsewhere like Amazon but probably? Sometimes if you can only afford to buy a few of the volumes, you can just read all of what is available here or some other site, and buy the volume/s that are not posted here (I did that with a few manga such as A Strange and Mystifying Story, False Memories, Love Stage...)
Thank you (⌒▽⌒)
Once I heard there is a bl manga in which ML is ugly. I want to read it.(づ￣ ³￣)づ