It's hard to say for sure. Manhwa often have twist and turns. The boy next door could be a vampire if the story takes a supernatural turn and reveals it later on.
Overall, 'Do It Next Door' manhwa could be about various themes like love, friendship, or mystery within a neighborhood setting. Maybe there are secrets being uncovered or heartwarming moments shared among the characters.
There were a few novels that were somewhat similar to " The Prince Charming Proposes Again Today ", which told the story of the female lead and the cold Prince Charming living next door. I recommend the following two novels to you: " Mr. Huo, Let's Fall in Love " and " The Adonis Who Arrives Next Door ". The former told the story of the female protagonist living in the house of the male god next door to avoid the jerk's reconciliation. She found that the male god was actually the heir of a wealthy family. He was cold and heartless, but he often asked about her well-being. The latter was about the female lead being pestered by CEO Lu's dog next door, which attracted the attention of the national goddess. There were many interesting lines and interactions in the story. I hope you like my recommendation.
"Dear and Loved" was a short romance novel written by Mo Bao Fei Bao. Its original name was "Stewed Squid with Honey Sauce." The story was about Tong Nian being coerced by his friend to watch the video for an hour in an internet cafe. The novel was later adapted into a TV series,"Dear Loved," with Yang Zi and Li Xian as the main actors. There were other related novels about "Dear", such as "Dear (Ghost Ugly)". However, the search results did not provide any detailed information about the content and plot of the novel.
"Dear and Loved" was a short romance novel written by Mo Bao Fei Bao. Its original name was "Stewed Squid with Honey Sauce." The story was about Tong Nian being coerced by his friend to watch the video for an hour in an internet cafe. The novel was later adapted into a TV series,"Dear Loved," with Yang Zi and Li Xian as the main actors. There were other related novels about "Dear", such as "Dear (Ghost Ugly)".
" Dao Sect, Dao Sect " was a martial arts cultivation novel written by Xue Qinghuan. The novel told the story of how the male and female protagonists experienced ups and downs in an imaginary world, lived through a life of thunderbolt and shock, and finally broke through the myriad phenomena of heaven and earth to achieve freedom. The novel took Taoism cultivation as the theme, emphasizing the importance of cultivation and the way to become an immortal. Whether it was reading forward, backward, forward, backward, left, right, inside, or outside, they were all part of the Dao Sect. The novel has been completed, and the entire TMT e-book can be downloaded for free.
The Loving Dragon Son-in-law was an urban romance novel written by Mr. Ye and Young Master Luo. The main story was about Ye Chen, the live-in son-in-law who was looked down upon by others. In fact, he was the eldest young master of a top family. Through a series of efforts and changes, he finally made those who looked down on him kneel in front of him. The novel was still in the midst of being serialised. The content of the latest chapter included the revelation of Jordan's identity and his interactions with the other characters. The specific plot and ending could only be known after reading the entire novel.