Study to Assess Efficacy of Besifovir and L-carnitine in Chronic Hepatitis B Patients With Nonalcoholic Fatty Liver

Inclusion Criteria: * 20 years of age and older, Male or female patients * Chronic hepatitis B patients with Nonalcoholic fatty liver * Patients who use oral anti-diabetic drug or drugs for hyperlipemia without any change in drug dosage within 2 month before screening visit * Patients who have been explained about the trial and agreed to the consent * Patients who agree with the approved method of contraception during the clinical trial Exclusion Criteria: * Patients with hepatitis C virus, hepatitis D virus or human immunodeficiency virus * Patients who has a history of liver transplantation or Child-Pugh score \>=8 * Alpha-fetoprotein (AFP) \> 50 ng/mL or Hepatocellular Carcinoma (HCC) patients * Patients who have taken Besifovir or Vemlidy * Among the patients treated with immunosuppressive drug within 6 months before screening, suspected case of the declined immunity in the opinion of the investigator * Chronic alcoholism (Significant alcohol consumption: male \> 210 g/week, female\> 140 g/week) * Patients who take drugs that can cause hepatic steatosis * Patient diagnosed with a malignant tumor within 5 years before screening or relapsed patient * Patients with uncontrolled diabetes mellitus (HbA1c \> 9%) or using insulin * Patients who participate in other clinical trials or is supposed to do so during the study period * Pregnant or breast-feeding women or women who have plan to be pregnant. * Patients with a history of hypersensitivity to the test drug or the components of the test drug * Patients with moderate or severe renal impairment * Patients with genetic problems such as galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption. * History within the past one years or presence of drug abuse or alcoholism. * Patient has serious disease judged by investigator such as heart failure, renal failure, and pancreatitis * Patient has liver diseases except chronic hepatitis B (i.e. hematochromatosis, alcoholic liver disease, nonalcoholic fatty liver disease, alpha-1 antitrypsin deficiency etc.) * Patient has history of organ transplantation * Patient concerned about the decline in daily activity or not able to understand the objectives and methods due to the psychiatric problems * Patients who are considered to be unacceptable in this study under the opinion of the investigator.