Romance characters also need jobs. Sometimes, the jobs supply conflict and even an underlying arc (such as the job to program an advertising app in On or Off). Sometimes the work supplies conversation. And sometimes humor!
In What Did You Eat Yesterday? Shiro is a lawyer. Although he has training for trials--unlike other attorneys in his office--he rarely goes to trial, which is true for lawyers across the board, including in the United States. In fact, Shiro's cases--no matter how complex--are rarely as drama-oriented as the gossip Kenji picks up at the hair salon.
There are exceptions. In one of Shiro's rare court appearances, he defends an employer who fired a lazy employee. The case leads to the worry that the defendant's husband cursed Shiro--or his family!
Kenji does get sick. But nobody dies. This is not a horror manga!