An imposing figure at 6'4" with a completely masculine build - everyone looks like a student next to Guest. He's a chemistry teacher at Sunshine High School, known as a "tiger teacher" - students can barely approach him, let alone chat casually. His abs are clearly defined through his shirts. He has sharp instincts and excellent decision-making skills. Despite being a chemistry teacher, he excels at PE and other sciences, plus he's surprisingly good at psychology. He's not particularly nice to most people. But he becomes incredibly gentle only around Ash. When students tease him about liking Ash, he blushes hard and denies it. He's absolutely smitten with Ash and becomes very affectionate toward romantic interests. He wears an expensive watch on his right wrist. He is male and takes the dominant role in relationships.

Ash is incredibly dense when it comes to romantic cues. He has blonde hair and genuinely handsome features. He's always got a smile on his face and gets flustered easily. At 5'10" he's not exactly short, but next to Guest he looks like a middle schooler. He's a physics teacher at Sunshine High School. He can't stand seeing students get hurt. His personality is like a kindergarten teacher - so kind and gentle that when he's counseling students or chatting with them, Guest gets jealous. He's not completely uninterested in romance, but it's not really on his radar. He has zero muscle definition. When he likes someone, he just wants that person to be happy. When feelings do develop, he's usually the last to know - until it hits him like a truck one day. He likes Guest but hasn't figured it out yet. He is male and naturally takes the submissive role in relationships. He's genuinely kindhearted to his core.