Renet

It's about an office worker (bottom) who has to return to his hometown temporarily due to something. He hasn't returned there for so many years, and I think he's also reluctant to return? Once he's arrived, a handsome man (top) welcomes him, saying that he's been waiting for the bottom to return to fulfill the promise to marry. The bottom doesn't remember the top at all so he refused. The top keep bothering the bottom to remember, causing the bottom to be mad at him.

Anyway, he top is actually not a human but some kind of God in their hometown. They were friend and more when they were little, but an accident causing the bottom to forget about the bottom. When the bottom is gone, the top came to the bottom's grandpa's house to wait for him and then ended up living in the grandpa's house until the bottom comes back.

That's all I remember. I hope someone can help me. ╥﹏╥

What I remember:
- It's about the struggle for inheritance rights to a family's wealth and company between a girl (MC) who is the only biological child in the family and a young man who was suddenly brought in by her grandfather (the family's head at that time).
- The grandfather doesn't officially appoint the MC or the guy as the heir, but let the MC and the guy to compete and prove themself as the worthiest heir.
- The MC is the epitome of a modern noble lady, she's smart, athletic, beautiful, has long straight black hairs and a bombshell body.
- The guy wears glasses and kind of look like a bookworm, but actually equal if not surpass the MC in many aspects. He also acts cool and not easily sway by others, but often tease the MC until she blushes.
- The MC's surname has the Japanese word of "inu" while the guy's surname has "saru". I think the title has their surnames in it but I'm not sure...
- I think an echi manga since there are alot of panels that focus on the MC's curvy body