Day after day, he continued to strive to solve the problem.

He started a business without a plan, forgetting the lesson of 'peach and chestnut seeds take three years to bear fruit, persimmons eight years.'

She gave him a kiss.

He kissed her.

The mouse squeaked 'chu'.

I think that person is what you call a 'chuunibyou'.

I started studying for the junior high school entrance exam for junior high school students.

He received a command from his boss and started a new project.

I will help you.

When spring comes, the east winds start to blow.