Dazzling Smiley Dog

Souichi, an office worker, was being swayed by a large dog, Raku, who lived in our house every day. On top of being a NEET, Raku is a helpless guy who is noisy and has zero housework skills. But he couldn't leave something alone, and Souichi began to feel comfortable with this life. However, one day, Niraku makes a bombshell statement saying, "I want to marry Sou-chan!" Younger large dog x introverted Lehman, can the dog open Lehman's heart?!?