Ani Tomo's Onii (Nanase Yukihiro) is very similar to Shuunin (Kurosawa) in Dame na Watashi ni Koishite Kudasai. They are both very strict, mischievous yet caring. Both manga are very well written, enjoyable and funny.
Both are more mature romances set in a non-high school/work setting. The main male lead is a cold person who is the main heroine's senior. The two males also start to warm up to the heroine throughout the story. The two heroines both act sort of the same way in which they're inexperienced with love and kinda awkward. They also have "bad luck" with guys. Also love triangles, food/eating dinner together, and jealous female rivals.
If you like the josei comedy Hotaru no Hikari - I think you should try Dame na Watashi ni Koi Shite Kudasai. These comedies have a similar flavor, both women are about the same age, in their late twenties and have never had a successful love life, each of them craves food and likes to drink! lol. The comedy in each is centered around them having to live with their boss because of money problems, and their bantering conversations where they make fun of their boss to his face is similar. They also have to rely on this boss and date another younger guy to try to become independent as if that would work! lol These have a lot of humor and less drama of some other joseis. It's a lot of fun to watch their weird antics, and the comedy between them and the boss guys makes you hope for a future romance between them.  read more
- similar main characters - a little dopey and eager to please but ultimately kind and trying their hardest (while they dig themselves into deep, deep holes)
- main character hates the guy from earlier interactions, but come around after spending more time with him and finding out he's actually a really sweet and caring guy (though he's not tsundere in Liar x Liar)
- same optimistic outlook - no malicious asshole characters, no overdone overly serious drama, cute humor, and two leads who really, really love each other
Although the genre is different (Dame: Josei, Kaichou: Shojo), Both couple is so hilarious. They dont hold back at abusing each other patner, be it language or action. Seeing from reader point of view, their interaction makes me laugh so hard. Recommended for those who like RomCom story