第 87 集: 大雄在母親指控他隱瞞考試成績後，使用保護性蝸牛殼

87

Nobita gets called a liar by his mom when she believes him to be hiding his recent exam. Nobita complains to Doraemon and exchanges his snacks for a snail shell that protects him from his surroundings. Shizuka shows up near the end and returns a journal that holds his exam grade. Nobita's mom apologizes, but is met with Nobita's demands... until she asks him for his grade. (Source: Wikipedia)