Can war be justified? Among the principles of war ethics, the “morality of war” defines the conditions under which war can be justified, while the 'morality in war' sets the limits on what actions are permissible during war. International humanitarian law, a subset of this, states, "Those who do not participate in or can no longer participate in hostile acts have the right to be respected for their lives, physical and mental preservation. Such persons should not be discriminated against unfavorably, but should be protected and treated humanely." Therefore, "Civilians as a group and as individuals should not be attacked, the attack should be limited entirely to military targets." As stipulated above, civilians deserve primary protection during war, yet they have not been adequately protected in the Russia-Ukraine conflict. Since the war began on February 24, 2022, approximately 12,700 civilians have been killed and 30,000 injured. Russia continues to use heavy ordnance, including long-range missiles and drone glide bombs, targeting civilian areas. Additionally, both Russia and Ukraine employ attack drones, which have caused numerous civilian casualties. The damage to children and adolescents is also serious. By the end of 2024, 669 children and adolescents were killed, 1,833 were injured, more than 2.4 million children left their homes, and at least 200 were forcibly sent to Russia. Among the numerous instances of this violation of war ethics, the bombing of the Mariupol Theater is a prime example. Mariupol is a port city located in southeastern Ukraine. It was also the only land route connecting Crimea to the Donbas(Donetsk+Luhansk) region occupied by pro-Russian rebels, and was one of the fiercest fighting since the war. On March 16, 2022, residents of Mariupol were evacuated to the Mariupol Theater to avoid continuous Russian airstrikes, but suddenly, the Russians began to bomb the Mariupol Theater. Eventually, the theater collapsed and hundreds of civilians were killed. The Mariupol Theater was a purely private facility that was not subject to bombing, and at that time, it was marked "Children(Дети)" in Russian in front/backyard of the Mariupol Theater building to indicate that civilians were being evacuated. However, the bombing took place indiscriminately. In addition, numerous war crimes, including the Bucha massacre and the Kramatorsk train station missile attack, have continued, leaving civilians to live each day in constant anxiety. Currently, both Russia and Ukraine are holding talks for a ceasefire, starting with the U.S.-Ukraine summit on February 28, 2025. Attention is now focused on when this war will end.