Hana yori dango - it's a classic and in my opinion a must watch, I just love this manga adaptation is very well done and it has Matsumoto Jun, Oguri Shun and Matsuda Shota!!
Good morning Call our campus days - this one is a very good continuation of first season and Uehara definitely is not cold as in the first one. Great second lead as well.
Kahogo no Kahoko - This one was one of last year's best dramas, very sweet story cute OTP and also family focused.
Kurosagi - Yamapi being a swindler is definitely interesting to see him messing up with the bad guys.
Ouroboros - Ikuta Toma, Oguri Shun and Ueno Juri; this drama has an excellent cast and the story is pretty interesting with an unexpected ending.
Finally I recommend NOT to watch Gira Gira, it is a pretty boring drama and you won't be losing much if you pass on this one