GuessAnime.

5. Dragon Yashinatte Kudasai

One day, a college student named Murakami encounters a dragon named Ilsela who came from another world. Ilsela, who aims to be an "Ichiryumae," seems to want someone to "adopt" them while they train in the human world...!?" Eating, sleeping, and playing with a dragon. A relaxed fantasy in a six-tatami room.

Dragon Yashinatte Kudasai is currently publishing . It is also Known as: ドラゴン養ってください, Dragon Yashinatte Kudasai

4. Emperor to Issho

A high school girl randomly finds an emperor penguin in her refrigerator and decides to keep it as a pet.

The Emperor and I is finished and has 4 Volumes and 38 Chapters. It is also Known as: エンペラーといっしょ, Emperor and I

3. Mamono-tachi wa Katazukerarenai

Monsters can't clean , hence a sister who can does that for them.

Note: Includes 3 extra chapters.

Mamono-tachi wa Katazukerarenai is finished and has 4 Volumes and 28 Chapters. It is also Known as: 魔物たちは片付けられない, Mamonotachi wa Katazuke Rarenai, Mamono Tachi ha Kattadzuke Rarenai, Mamono-tachi wa katadzuke rarenai, 魔物们不会打扫

2. Kobayashi-san Chi no Maid Dragon

Miss Kobayashi is your average office worker who lives a boring life, alone in her small apartment–until she saves the life of a female dragon in distress. The dragon, named Tohru, has the ability to magically transform into an adorable human girl , who will do anything to pay off her debt of gratitude, whether Miss Kobayashi likes it or not. With a very persistent and amorous dragon as a roommate, nothing comes easy, and Miss Kobayashi’s normal life is about to go off the deep end!

Miss Kobayashi's Dragon Maid is currently publishing . It is also Known as: 小林さんちのメイドラゴン, The maid dragon of Kobayashi-san